diff --git a/native/jni/src/binary_format.h b/native/jni/src/binary_format.h
index 5d8b2a0f2..eec52e323 100644
--- a/native/jni/src/binary_format.h
+++ b/native/jni/src/binary_format.h
@@ -360,7 +360,7 @@ inline int BinaryFormat::getTerminalPosition(const uint8_t *const root,
     while (true) {
         // If we already traversed the tree further than the word is long, there means
         // there was no match (or we would have found it).
-        if (wordPos > length) return NOT_VALID_WORD;
+        if (wordPos >= length) return NOT_VALID_WORD;
         int charGroupCount = BinaryFormat::getGroupCountAndForwardPointer(root, &pos);
         const int32_t wChar = forceLowerCaseSearch ? toLowerCase(inWord[wordPos]) : inWord[wordPos];
         while (true) {
@@ -383,7 +383,7 @@ inline int BinaryFormat::getTerminalPosition(const uint8_t *const root,
                         // character that does not match, as explained above, it means the word is
                         // not in the dictionary (by virtue of this chargroup being the only one to
                         // match the word on the first character, but not matching the whole word).
-                        if (wordPos > length) return NOT_VALID_WORD;
+                        if (wordPos >= length) return NOT_VALID_WORD;
                         if (inWord[wordPos] != character) return NOT_VALID_WORD;
                         character = BinaryFormat::getCodePointAndForwardPointer(root, &pos);
                     }
diff --git a/native/jni/src/unigram_dictionary.cpp b/native/jni/src/unigram_dictionary.cpp
index b7e245a6c..cf806c111 100644
--- a/native/jni/src/unigram_dictionary.cpp
+++ b/native/jni/src/unigram_dictionary.cpp
@@ -451,7 +451,7 @@ int UnigramDictionary::getSubStringSuggestion(
         const bool hasAutoCorrectionCandidate, const int currentWordIndex,
         const int inputWordStartPos, const int inputWordLength,
         const int outputWordStartPos, const bool isSpaceProximity, int *freqArray,
-        int*wordLengthArray, unsigned short *outputWord, int *outputWordLength) const {
+        int *wordLengthArray, unsigned short *outputWord, int *outputWordLength) const {
     if (inputWordLength > MULTIPLE_WORDS_SUGGESTION_MAX_WORD_LENGTH) {
         return FLAG_MULTIPLE_SUGGEST_ABORT;
     }
@@ -546,9 +546,9 @@ int UnigramDictionary::getSubStringSuggestion(
         freq = score >> (nextWordLength + TWO_WORDS_PLUS_OTHER_ERROR_CORRECTION_DEMOTION_DIVIDER);
     }
     if (DEBUG_DICT) {
-        AKLOGI("Freq(%d): %d, length: %d, input length: %d, input start: %d (%d)"
-                , currentWordIndex, freq, nextWordLength, inputWordLength, inputWordStartPos,
-                wordLengthArray[0]);
+        AKLOGI("Freq(%d): %d, length: %d, input length: %d, input start: %d (%d)",
+                currentWordIndex, freq, nextWordLength, inputWordLength, inputWordStartPos,
+                (currentWordIndex > 0) ? wordLengthArray[0] : 0);
     }
     if (freq <= 0 || nextWordLength <= 0
             || MAX_WORD_LENGTH <= (outputWordStartPos + nextWordLength)) {