diff --git a/tools/dicttool/Android.mk b/tools/dicttool/Android.mk
index 3d09c05..895e4a2 100644
--- a/tools/dicttool/Android.mk
+++ b/tools/dicttool/Android.mk
@@ -30,6 +30,7 @@
 USED_TARGETTED_UTILS := \
         $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/ByteArrayDictBuffer.java \
         $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/CollectionUtils.java \
+        $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/FileUtils.java \
         $(LATINIME_CORE_SOURCE_DIRECTORY)/utils/JniUtils.java
 
 DICTTOOL_ONDEVICE_TESTS_DIRECTORY := \