diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index 8d51a2f..9e7407a 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -43,7 +43,7 @@
     com_android_inputmethod_keyboard_ProximityInfo.cpp \
     com_android_inputmethod_latin_BinaryDictionary.cpp \
     com_android_inputmethod_latin_DicTraverseSession.cpp \
-    com_android_inputmethod_latin_makedict_BinaryDictInputOutput.cpp \
+    com_android_inputmethod_latin_makedict_BinaryDictDecoder.cpp \
     jni_common.cpp
 
 LATIN_IME_CORE_SRC_FILES := \
diff --git a/native/jni/com_android_inputmethod_latin_makedict_BinaryDictInputOutput.cpp b/native/jni/com_android_inputmethod_latin_makedict_BinaryDictDecoder.cpp
similarity index 75%
rename from native/jni/com_android_inputmethod_latin_makedict_BinaryDictInputOutput.cpp
rename to native/jni/com_android_inputmethod_latin_makedict_BinaryDictDecoder.cpp
index f78883c..457b226 100644
--- a/native/jni/com_android_inputmethod_latin_makedict_BinaryDictInputOutput.cpp
+++ b/native/jni/com_android_inputmethod_latin_makedict_BinaryDictDecoder.cpp
@@ -14,16 +14,16 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "LatinIME: jni: BinaryDictInputOutput"
+#define LOG_TAG "LatinIME: jni: BinaryDictDecoder"
 
-#include "com_android_inputmethod_latin_makedict_BinaryDictInputOutput.h"
+#include "com_android_inputmethod_latin_makedict_BinaryDictDecoder.h"
 
 #include "defines.h"
 #include "jni.h"
 #include "jni_common.h"
 
 namespace latinime {
-static int latinime_BinaryDictInputOutput_doNothing(JNIEnv *env, jclass clazz) {
+static int latinime_BinaryDictDecoder_doNothing(JNIEnv *env, jclass clazz) {
     // This is a phony method for test - it does nothing. It just returns some value
     // unlikely to be in memory by chance for testing purposes.
     // TODO: remove this method.
@@ -35,13 +35,13 @@
         // TODO: remove this entry when we have one useful method in here
         const_cast<char *>("doNothing"),
         const_cast<char *>("()I"),
-        reinterpret_cast<void *>(latinime_BinaryDictInputOutput_doNothing)
+        reinterpret_cast<void *>(latinime_BinaryDictDecoder_doNothing)
     },
 };
 
-int register_BinaryDictInputOutput(JNIEnv *env) {
+int register_BinaryDictDecoder(JNIEnv *env) {
     const char *const kClassPathName =
-            "com/android/inputmethod/latin/makedict/BinaryDictInputOutput";
+            "com/android/inputmethod/latin/makedict/BinaryDictDecoder";
     return registerNativeMethods(env, kClassPathName, sMethods, NELEMS(sMethods));
 }
 } // namespace latinime
diff --git a/native/jni/com_android_inputmethod_latin_makedict_BinaryDictInputOutput.h b/native/jni/com_android_inputmethod_latin_makedict_BinaryDictDecoder.h
similarity index 71%
rename from native/jni/com_android_inputmethod_latin_makedict_BinaryDictInputOutput.h
rename to native/jni/com_android_inputmethod_latin_makedict_BinaryDictDecoder.h
index e622ed4..7f3cb67 100644
--- a/native/jni/com_android_inputmethod_latin_makedict_BinaryDictInputOutput.h
+++ b/native/jni/com_android_inputmethod_latin_makedict_BinaryDictDecoder.h
@@ -14,12 +14,12 @@
  * limitations under the License.
  */
 
-#ifndef _COM_ANDROID_INPUTMETHOD_LATIN_MAKEDICT_BINARYDICTINPUTOUTPUT_H
-#define _COM_ANDROID_INPUTMETHOD_LATIN_MAKEDICT_BINARYDICTINPUTOUTPUT_H
+#ifndef _COM_ANDROID_INPUTMETHOD_LATIN_MAKEDICT_BINARYDICTDECODER_H
+#define _COM_ANDROID_INPUTMETHOD_LATIN_MAKEDICT_BINARYDICTDECODER_H
 
 #include "jni.h"
 
 namespace latinime {
-int register_BinaryDictInputOutput(JNIEnv *env);
+int register_BinaryDictDecoder(JNIEnv *env);
 } // namespace latinime
-#endif // _COM_ANDROID_INPUTMETHOD_LATIN_MAKEDICT_BINARYDICTINPUTOUTPUT_H
+#endif // _COM_ANDROID_INPUTMETHOD_LATIN_MAKEDICT_BINARYDICTDECODER_H
diff --git a/native/jni/jni_common.cpp b/native/jni/jni_common.cpp
index 733e15f..d44be67 100644
--- a/native/jni/jni_common.cpp
+++ b/native/jni/jni_common.cpp
@@ -23,7 +23,7 @@
 #include "com_android_inputmethod_latin_BinaryDictionary.h"
 #include "com_android_inputmethod_latin_DicTraverseSession.h"
 #endif
-#include "com_android_inputmethod_latin_makedict_BinaryDictInputOutput.h"
+#include "com_android_inputmethod_latin_makedict_BinaryDictDecoder.h"
 #include "defines.h"
 
 /*
@@ -55,8 +55,8 @@
         return -1;
     }
 #endif
-    if (!latinime::register_BinaryDictInputOutput(env)) {
-        AKLOGE("ERROR: BinaryDictInputOutput native registration failed");
+    if (!latinime::register_BinaryDictDecoder(env)) {
+        AKLOGE("ERROR: BinaryDictDecoder native registration failed");
         return -1;
     }
     /* success -- return valid version number */
diff --git a/native/jni/src/suggest/core/dictionary/probability_utils.h b/native/jni/src/suggest/core/dictionary/probability_utils.h
index f450087..2192135 100644
--- a/native/jni/src/suggest/core/dictionary/probability_utils.h
+++ b/native/jni/src/suggest/core/dictionary/probability_utils.h
@@ -41,7 +41,7 @@
         // the unigram probability to be the median value of the 17th step from the top. A value of
         // 0 for the bigram probability represents the middle of the 16th step from the top,
         // while a value of 15 represents the middle of the top step.
-        // See makedict.BinaryDictInputOutput for details.
+        // See makedict.BinaryDictDecoder for details.
         const float stepSize = static_cast<float>(MAX_PROBABILITY - unigramProbability)
                 / (1.5f + MAX_BIGRAM_ENCODED_PROBABILITY);
         return unigramProbability