diff --git a/direct/src/directbase/Sources.pp b/direct/src/directbase/Sources.pp
index 629a049177..dae2615e6a 100644
--- a/direct/src/directbase/Sources.pp
+++ b/direct/src/directbase/Sources.pp
@@ -1,3 +1,5 @@
+#define USE_PACKAGES cg  // from gobj.
+
 #begin lib_target
   #define TARGET directbase