diff --git a/native/src/dictionary.h b/native/src/dictionary.h
index 61f7cf0..1cd517c 100644
--- a/native/src/dictionary.h
+++ b/native/src/dictionary.h
@@ -37,7 +37,7 @@
     int getBigrams(unsigned short *word, int length, int *codes, int codesSize,
             unsigned short *outWords, int *frequencies, int maxWordLength, int maxBigrams,
             int maxAlternatives) {
-        return mUnigramDictionary->getBigrams(word, length, codes, codesSize, outWords, frequencies,
+        return mBigramDictionary->getBigrams(word, length, codes, codesSize, outWords, frequencies,
                 maxWordLength, maxBigrams, maxAlternatives);
     }
     bool isValidWord(unsigned short *word, int length);
@@ -53,6 +53,7 @@
     static bool getTerminal(const unsigned char *dict, int *pos);
     static int getAddress(const unsigned char *dict, int *pos);
     static int getFreq(const unsigned char *dict, const bool isLatestDictVersion, int *pos);
+    static int wideStrLen(unsigned short *str);
 
 private:
     bool hasBigram();
@@ -117,5 +118,14 @@
     return freq;
 }
 
+
+inline int Dictionary::wideStrLen(unsigned short *str) {
+    if (!str) return 0;
+    unsigned short *end = str;
+    while (*end)
+        end++;
+    return end - str;
+}
+
 }; // namespace latinime
 #endif // LATINIME_DICTIONARY_H