diff --git a/native/jni/src/bigram_dictionary.cpp b/native/jni/src/bigram_dictionary.cpp
index 3eea51a..dade4f1 100644
--- a/native/jni/src/bigram_dictionary.cpp
+++ b/native/jni/src/bigram_dictionary.cpp
@@ -113,7 +113,7 @@
     }
     // If still no bigrams, we really don't have them!
     if (0 == pos) return 0;
-    int bigramFlags;
+    uint8_t bigramFlags;
     int bigramCount = 0;
     do {
         bigramFlags = BinaryFormat::getFlagsAndForwardPointer(root, &pos);
@@ -153,7 +153,7 @@
             forceLowerCaseSearch);
 
     if (NOT_VALID_WORD == pos) return 0;
-    const int flags = BinaryFormat::getFlagsAndForwardPointer(root, &pos);
+    const uint8_t flags = BinaryFormat::getFlagsAndForwardPointer(root, &pos);
     if (0 == (flags & BinaryFormat::FLAG_HAS_BIGRAMS)) return 0;
     if (0 == (flags & BinaryFormat::FLAG_HAS_MULTIPLE_CHARS)) {
         BinaryFormat::getCodePointAndForwardPointer(root, &pos);
@@ -179,7 +179,7 @@
     }
     if (0 == pos) return;
 
-    int bigramFlags;
+    uint8_t bigramFlags;
     do {
         bigramFlags = BinaryFormat::getFlagsAndForwardPointer(root, &pos);
         const int frequency = BinaryFormat::MASK_ATTRIBUTE_FREQUENCY & bigramFlags;
@@ -215,7 +215,7 @@
     int nextWordPos = BinaryFormat::getTerminalPosition(root, word2, length2,
             false /* forceLowerCaseSearch */);
     if (NOT_VALID_WORD == nextWordPos) return false;
-    int bigramFlags;
+    uint8_t bigramFlags;
     do {
         bigramFlags = BinaryFormat::getFlagsAndForwardPointer(root, &pos);
         const int bigramPos = BinaryFormat::getAttributeAddressAndForwardPointer(root, bigramFlags,