diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index 0e36f3d..d83bdad 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -78,6 +78,7 @@
         dynamic_patricia_trie_reading_helper.cpp \
         dynamic_patricia_trie_reading_utils.cpp \
         dynamic_patricia_trie_writing_helper.cpp \
+        dynamic_patricia_trie_writing_utils.cpp \
         patricia_trie_policy.cpp \
         patricia_trie_reading_utils.cpp) \
     $(addprefix suggest/policyimpl/dictionary/utils/, \