diff --git a/xwords4/android/XWords4/jni/Android.mk b/xwords4/android/XWords4/jni/Android.mk
index 1557529d8..4e75c7a84 100644
--- a/xwords4/android/XWords4/jni/Android.mk
+++ b/xwords4/android/XWords4/jni/Android.mk
@@ -30,6 +30,8 @@ local_DEFINES += \
 	-DRELAY_ROOM_DEFAULT=\"\"\
 	-D__LITTLE_ENDIAN \
 
+#	-DXWFEATURE_WALKDICT_FILTER \
+
 local_SRC_FILES +=         \
 	xwjni.c                \
 	utilwrapper.c          \