diff --git a/Android.common.mk b/Android.common.mk
index ffe92198..71f14ec3 100644
--- a/Android.common.mk
+++ b/Android.common.mk
@@ -1,3 +1,4 @@
+# XXX: Consider moving these to config.h analogous to autoconf.
 LOCAL_CFLAGS += \
 	-DHAVE_VISIBILITY=1 \
 	-DHAVE_LIBDRM_ATOMIC_PRIMITIVES=1