diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 64aabda..02b189f 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -124,6 +124,7 @@
 LOCAL_RENDERSCRIPT_TARGET_API:=
 LOCAL_DEX_PREOPT:= # '',true,false,nostripping
 LOCAL_DEX_PREOPT_IMAGE_LOCATION:=
+LOCAL_DEX_PREOPT_FLAGS:=
 LOCAL_PROTOC_OPTIMIZE_TYPE:= # lite(default),micro,nano,full
 LOCAL_PROTOC_FLAGS:=
 LOCAL_PROTO_JAVA_OUTPUT_PARAMS:=