diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/bigram_dict_content.cpp b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/bigram_dict_content.cpp
index d539227..e1ceaee 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/bigram_dict_content.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/bigram_dict_content.cpp
@@ -23,9 +23,11 @@
 const BigramEntry BigramDictContent::getBigramEntryAndAdvancePosition(
         int *const bigramEntryPos) const {
     const BufferWithExtendableBuffer *const bigramListBuffer = getContentBuffer();
-    if (*bigramEntryPos < 0 || *bigramEntryPos >=  bigramListBuffer->getTailPosition()) {
-        AKLOGE("Invalid bigram entry position. bigramEntryPos: %d, bufSize: %d",
-                *bigramEntryPos, bigramListBuffer->getTailPosition());
+    const int bigramEntryTailPos = (*bigramEntryPos) + getBigramEntrySize();
+    if (*bigramEntryPos < 0 || bigramEntryTailPos > bigramListBuffer->getTailPosition()) {
+        AKLOGE("Invalid bigram entry position. bigramEntryPos: %d, bigramEntryTailPos: %d, "
+                "bufSize: %d", *bigramEntryPos, bigramEntryTailPos,
+                        bigramListBuffer->getTailPosition());
         ASSERT(false);
         return BigramEntry(false /* hasNext */, NOT_A_PROBABILITY,
                 Ver4DictConstants::NOT_A_TERMINAL_ID);
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/bigram_dict_content.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/bigram_dict_content.h
index b8bdb63..52447a3 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/bigram_dict_content.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/bigram_dict_content.h
@@ -99,6 +99,20 @@
         return hasNext ? Ver4DictConstants::BIGRAM_HAS_NEXT_MASK : 0;
     }
 
+    int getBigramEntrySize() const {
+        if (mHasHistoricalInfo) {
+            return Ver4DictConstants::BIGRAM_FLAGS_FIELD_SIZE
+                    + Ver4DictConstants::TIME_STAMP_FIELD_SIZE
+                    + Ver4DictConstants::WORD_LEVEL_FIELD_SIZE
+                    + Ver4DictConstants::WORD_COUNT_FIELD_SIZE
+                    + Ver4DictConstants::BIGRAM_TARGET_TERMINAL_ID_FIELD_SIZE;
+        } else {
+            return Ver4DictConstants::BIGRAM_FLAGS_FIELD_SIZE
+                    + Ver4DictConstants::PROBABILITY_SIZE
+                    + Ver4DictConstants::BIGRAM_TARGET_TERMINAL_ID_FIELD_SIZE;
+        }
+    }
+
     bool runGCBigramList(const int bigramListPos,
             const BigramDictContent *const sourceBigramDictContent, const int toPos,
             const TerminalPositionLookupTable::TerminalIdMap *const terminalIdMap,