diff --git a/core/clang/config.mk b/core/clang/config.mk
index dbdfa61..b31e419 100644
--- a/core/clang/config.mk
+++ b/core/clang/config.mk
@@ -144,7 +144,8 @@
 endif
 
 # A list of projects that are allowed to set LOCAL_CLANG to false.
-LOCAL_CLANG_EXCEPTION_PROJECTS := \
+# INTERNAL_LOCAL_CLANG_EXCEPTION_PROJECTS is defined later in other config.mk.
+LOCAL_CLANG_EXCEPTION_PROJECTS = \
   bionic/tests/ \
   device/huawei/angler/ \
   device/lge/bullhead/ \