diff --git a/java/src/com/android/inputmethod/latin/BinaryDictionary.java b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
index 7e6c53e..e0adc9a 100644
--- a/java/src/com/android/inputmethod/latin/BinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
@@ -90,9 +90,9 @@
     private native void closeNative(long dict);
     private native int getFrequencyNative(long dict, int[] word, int wordLength);
     private native boolean isValidBigramNative(long dict, int[] word1, int[] word2);
-    private native int getSuggestionsNative(long dict, long proximityInfo, int[] xCoordinates,
-            int[] yCoordinates, int[] times, int[] pointerIds, int[] inputCodes, int codesSize,
-            int commitPoint, boolean isGesture,
+    private native int getSuggestionsNative(long dict, long proximityInfo, long traverseSession,
+            int[] xCoordinates, int[] yCoordinates, int[] times, int[] pointerIds,
+            int[] inputCodes, int codesSize, int commitPoint, boolean isGesture,
             int[] prevWordCodePointArray, boolean useFullEditDistance, char[] outputChars,
             int[] outputScores, int[] outputIndices, int[] outputTypes);
     private static native float calcNormalizedScoreNative(
@@ -129,7 +129,8 @@
         final int codesSize = isGesture ? ips.getPointerSize() : composerSize;
         // proximityInfo and/or prevWordForBigrams may not be null.
         final int tmpCount = getSuggestionsNative(mNativeDict,
-                proximityInfo.getNativeProximityInfo(), ips.getXCoordinates(),
+                proximityInfo.getNativeProximityInfo(),
+                mDicTraverseSession.getSession(), ips.getXCoordinates(),
                 ips.getYCoordinates(), ips.getTimes(), ips.getPointerIds(),
                 mInputCodes, codesSize, 0 /* commitPoint */, isGesture, prevWordCodePointArray,
                 mUseFullEditDistance, mOutputChars, mOutputScores, mSpaceIndices, mOutputTypes);
diff --git a/java/src/com/android/inputmethod/latin/DicTraverseSession.java b/java/src/com/android/inputmethod/latin/DicTraverseSession.java
index d0c70f3..ae68e69 100644
--- a/java/src/com/android/inputmethod/latin/DicTraverseSession.java
+++ b/java/src/com/android/inputmethod/latin/DicTraverseSession.java
@@ -30,6 +30,10 @@
                 locale != null ? locale.toString() : "");
     }
 
+    public long getSession() {
+        return mNativeDicTraverseSession;
+    }
+
     private native long setDicTraverseSessionNative(String locale);
     private native void releaseDicTraverseSessionNative(long nativeDicTraverseSession);
 
diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
index 776f5f7..9de087a 100644
--- a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
@@ -122,14 +122,15 @@
 }
 
 static int latinime_BinaryDictionary_getSuggestions(JNIEnv *env, jobject object, jlong dict,
-        jlong proximityInfo, jintArray xCoordinatesArray, jintArray yCoordinatesArray,
-        jintArray timesArray, jintArray pointerIdArray, jintArray inputArray, jint arraySize,
-        jint commitPoint, jboolean isGesture,
+        jlong proximityInfo, jlong dicTraverseSession, jintArray xCoordinatesArray,
+        jintArray yCoordinatesArray, jintArray timesArray, jintArray pointerIdArray,
+        jintArray inputArray, jint arraySize, jint commitPoint, jboolean isGesture,
         jintArray prevWordForBigrams, jboolean useFullEditDistance, jcharArray outputArray,
         jintArray frequencyArray, jintArray spaceIndexArray, jintArray outputTypesArray) {
-    Dictionary *dictionary = (Dictionary*) dict;
+    Dictionary *dictionary = reinterpret_cast<Dictionary*>(dict);
     if (!dictionary) return 0;
-    ProximityInfo *pInfo = (ProximityInfo*)proximityInfo;
+    ProximityInfo *pInfo = reinterpret_cast<ProximityInfo*>(proximityInfo);
+    void *traverseSession = reinterpret_cast<void*>(dicTraverseSession);
     int *xCoordinates = env->GetIntArrayElements(xCoordinatesArray, 0);
     int *yCoordinates = env->GetIntArrayElements(yCoordinatesArray, 0);
     int *times = env->GetIntArrayElements(timesArray, 0);
@@ -145,10 +146,10 @@
 
     int count;
     if (isGesture || arraySize > 1) {
-        count = dictionary->getSuggestions(pInfo, xCoordinates, yCoordinates, times, pointerIds,
-                inputCodes, arraySize, prevWordChars, prevWordLength, commitPoint, isGesture,
-                useFullEditDistance, (unsigned short*) outputChars, frequencies, spaceIndices,
-                outputTypes);
+        count = dictionary->getSuggestions(pInfo, traverseSession, xCoordinates, yCoordinates,
+                times, pointerIds, inputCodes, arraySize, prevWordChars, prevWordLength,
+                commitPoint, isGesture, useFullEditDistance, (unsigned short*) outputChars,
+                frequencies, spaceIndices, outputTypes);
     } else {
         count = dictionary->getBigrams(prevWordChars, prevWordLength, inputCodes,
                 arraySize, (unsigned short*) outputChars, frequencies, outputTypes);
@@ -247,7 +248,7 @@
 static JNINativeMethod sMethods[] = {
     {"openNative", "(Ljava/lang/String;JJIIIII)J", (void*)latinime_BinaryDictionary_open},
     {"closeNative", "(J)V", (void*)latinime_BinaryDictionary_close},
-    {"getSuggestionsNative", "(JJ[I[I[I[I[IIIZ[IZ[C[I[I[I)I",
+    {"getSuggestionsNative", "(JJJ[I[I[I[I[IIIZ[IZ[C[I[I[I)I",
             (void*) latinime_BinaryDictionary_getSuggestions},
     {"getFrequencyNative", "(J[II)I", (void*)latinime_BinaryDictionary_getFrequency},
     {"isValidBigramNative", "(J[I[I)Z", (void*)latinime_BinaryDictionary_isValidBigram},
diff --git a/native/jni/com_android_inputmethod_latin_DicTraverseSession.cpp b/native/jni/com_android_inputmethod_latin_DicTraverseSession.cpp
index 8ee0450..e796537 100644
--- a/native/jni/com_android_inputmethod_latin_DicTraverseSession.cpp
+++ b/native/jni/com_android_inputmethod_latin_DicTraverseSession.cpp
@@ -26,12 +26,13 @@
 
 static jlong latinime_setDicTraverseSession(JNIEnv *env, jobject object,
         jstring localejStr) {
-    void *session = DicTraverseWrapper::getDicTraverseSession();
-    return reinterpret_cast<jlong>(session);
+    void *traverseSession = DicTraverseWrapper::getDicTraverseSession();
+    return reinterpret_cast<jlong>(traverseSession);
 }
 
-static void latinime_DicTraverseSession_release(JNIEnv *env, jobject object, jlong session) {
-    void *pi = reinterpret_cast<void*>(session);
+static void latinime_DicTraverseSession_release(
+        JNIEnv *env, jobject object, jlong traverseSession) {
+    void *pi = reinterpret_cast<void*>(traverseSession);
     if (!pi) return;
     DicTraverseWrapper::releaseDicTraverseSession(pi);
 }
diff --git a/native/jni/com_android_inputmethod_latin_DicTraverseSession.h b/native/jni/com_android_inputmethod_latin_DicTraverseSession.h
index 5238fd0..a84fe78 100644
--- a/native/jni/com_android_inputmethod_latin_DicTraverseSession.h
+++ b/native/jni/com_android_inputmethod_latin_DicTraverseSession.h
@@ -31,9 +31,9 @@
         }
         return 0;
     }
-    static void releaseDicTraverseSession(void *session) {
+    static void releaseDicTraverseSession(void *traverseSession) {
         if (sDicTraverseSessionReleaseMethod) {
-            sDicTraverseSessionReleaseMethod(session);
+            sDicTraverseSessionReleaseMethod(traverseSession);
         }
     }
  private:
diff --git a/native/jni/src/dictionary.cpp b/native/jni/src/dictionary.cpp
index ee55cfa..8c785a2 100644
--- a/native/jni/src/dictionary.cpp
+++ b/native/jni/src/dictionary.cpp
@@ -56,16 +56,17 @@
     delete mGestureDecoder;
 }
 
-int Dictionary::getSuggestions(ProximityInfo *proximityInfo, int *xcoordinates, int *ycoordinates,
-        int *times, int *pointerIds, int *codes, int codesSize, int *prevWordChars,
+int Dictionary::getSuggestions(ProximityInfo *proximityInfo, void *traverseSession,
+        int *xcoordinates, int *ycoordinates, int *times, int *pointerIds,
+        int *codes, int codesSize, int *prevWordChars,
         int prevWordLength, int commitPoint, bool isGesture,
         bool useFullEditDistance, unsigned short *outWords,
         int *frequencies, int *spaceIndices, int *outputTypes) {
     int result = 0;
     if (isGesture) {
         mGestureDecoder->setPrevWord(prevWordChars, prevWordLength);
-        result = mGestureDecoder->getSuggestions(proximityInfo, xcoordinates, ycoordinates,
-                times, pointerIds, codes, codesSize, commitPoint,
+        result = mGestureDecoder->getSuggestions(proximityInfo, traverseSession,
+                xcoordinates, ycoordinates, times, pointerIds, codes, codesSize, commitPoint,
                 outWords, frequencies, spaceIndices, outputTypes);
         if (DEBUG_DICT) {
             DUMP_RESULT(outWords, frequencies, 18 /* MAX_WORDS */, MAX_WORD_LENGTH_INTERNAL);
diff --git a/native/jni/src/dictionary.h b/native/jni/src/dictionary.h
index ab238c8..2c79527 100644
--- a/native/jni/src/dictionary.h
+++ b/native/jni/src/dictionary.h
@@ -44,9 +44,9 @@
     Dictionary(void *dict, int dictSize, int mmapFd, int dictBufAdjust, int typedLetterMultipler,
             int fullWordMultiplier, int maxWordLength, int maxWords, int maxPredictions);
 
-    int getSuggestions(ProximityInfo *proximityInfo, int *xcoordinates, int *ycoordinates,
-            int *times, int *pointerIds, int *codes, int codesSize, int *prevWordChars,
-            int prevWordLength, int commitPoint, bool isGesture,
+    int getSuggestions(ProximityInfo *proximityInfo, void *traverseSession, int *xcoordinates,
+            int *ycoordinates, int *times, int *pointerIds, int *codes, int codesSize,
+            int *prevWordChars, int prevWordLength, int commitPoint, bool isGesture,
             bool useFullEditDistance, unsigned short *outWords,
             int *frequencies, int *spaceIndices, int *outputTypes);
 
diff --git a/native/jni/src/gesture/gesture_decoder_wrapper.h b/native/jni/src/gesture/gesture_decoder_wrapper.h
index 03c84b5..b70c8e0 100644
--- a/native/jni/src/gesture/gesture_decoder_wrapper.h
+++ b/native/jni/src/gesture/gesture_decoder_wrapper.h
@@ -37,15 +37,15 @@
         delete mIncrementalDecoderInterface;
     }
 
-    int getSuggestions(ProximityInfo *pInfo, int *inputXs, int *inputYs, int *times,
-            int *pointerIds, int *codes, int inputSize, int commitPoint,
+    int getSuggestions(ProximityInfo *pInfo, void *traverseSession, int *inputXs, int *inputYs,
+            int *times, int *pointerIds, int *codes, int inputSize, int commitPoint,
             unsigned short *outWords, int *frequencies, int *outputIndices, int *outputTypes) {
         if (!mIncrementalDecoderInterface) {
             return 0;
         }
         return mIncrementalDecoderInterface->getSuggestions(
-                pInfo, inputXs, inputYs, times, pointerIds, codes, inputSize, commitPoint,
-                outWords, frequencies, outputIndices, outputTypes);
+                pInfo, traverseSession, inputXs, inputYs, times, pointerIds, codes,
+                inputSize, commitPoint, outWords, frequencies, outputIndices, outputTypes);
     }
 
     void reset() {
diff --git a/native/jni/src/gesture/incremental_decoder_interface.h b/native/jni/src/gesture/incremental_decoder_interface.h
index 6d2e273..e8d3a53 100644
--- a/native/jni/src/gesture/incremental_decoder_interface.h
+++ b/native/jni/src/gesture/incremental_decoder_interface.h
@@ -28,9 +28,10 @@
 
 class IncrementalDecoderInterface {
  public:
-    virtual int getSuggestions(ProximityInfo *pInfo, int *inputXs, int *inputYs, int *times,
-            int *pointerIds, int *codes, int inputSize, int commitPoint,
-            unsigned short *outWords, int *frequencies, int *outputIndices, int *outputTypes) = 0;
+    virtual int getSuggestions(ProximityInfo *pInfo, void *traverseSession,
+            int *inputXs, int *inputYs, int *times, int *pointerIds, int *codes,
+            int inputSize, int commitPoint, unsigned short *outWords, int *frequencies,
+            int *outputIndices, int *outputTypes) = 0;
     virtual void reset() = 0;
     virtual void setDict(const UnigramDictionary *dict, const BigramDictionary *bigram,
             const uint8_t *dictRoot, int rootPos) = 0;
diff --git a/native/jni/src/gesture/incremental_decoder_wrapper.h b/native/jni/src/gesture/incremental_decoder_wrapper.h
index 6980615..8d66b4e 100644
--- a/native/jni/src/gesture/incremental_decoder_wrapper.h
+++ b/native/jni/src/gesture/incremental_decoder_wrapper.h
@@ -37,15 +37,15 @@
         delete mIncrementalDecoderInterface;
     }
 
-    int getSuggestions(ProximityInfo *pInfo, int *inputXs, int *inputYs, int *times,
-            int *pointerIds, int *codes, int inputSize, int commitPoint,
+    int getSuggestions(ProximityInfo *pInfo, void *traverseSession, int *inputXs, int *inputYs,
+            int *times, int *pointerIds, int *codes, int inputSize, int commitPoint,
             unsigned short *outWords, int *frequencies, int *outputIndices, int *outputTypes) {
         if (!mIncrementalDecoderInterface) {
             return 0;
         }
         return mIncrementalDecoderInterface->getSuggestions(
-                pInfo, inputXs, inputYs, times, pointerIds, codes, inputSize, commitPoint,
-                outWords, frequencies, outputIndices, outputTypes);
+                pInfo, traverseSession, inputXs, inputYs, times, pointerIds, codes,
+                inputSize, commitPoint, outWords, frequencies, outputIndices, outputTypes);
     }
 
     void reset() {