diff --git a/core/base_rules.mk b/core/base_rules.mk
index c04d35d438..baa8932e0a 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -434,7 +434,7 @@ endif
 ###########################################################
 cleantarget := clean-$(LOCAL_MODULE)
 $(cleantarget) : PRIVATE_MODULE := $(LOCAL_MODULE)
-$(cleantarget) : PRIVATE_CLEAN_FILES += \
+$(cleantarget) : PRIVATE_CLEAN_FILES := \
     $(LOCAL_BUILT_MODULE) \
     $(LOCAL_INSTALLED_MODULE) \
     $(intermediates)