diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 8d84814..90a99ac 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -102,7 +102,7 @@
 LOCAL_SDK_RES_VERSION:=
 LOCAL_NDK_STL_VARIANT:=
 LOCAL_EMMA_INSTRUMENT:=
-LOCAL_PROGUARD_ENABLED:= # '',full,custom,nosystem,disabled
+LOCAL_PROGUARD_ENABLED:= # '',full,custom,nosystem,disabled,obfuscation,optimization
 LOCAL_PROGUARD_FLAGS:=
 LOCAL_PROGUARD_FLAG_FILES:=
 LOCAL_EMMA_COVERAGE_FILTER:=