--- a/stage4/generate_c/generate_c.cc	Sat Sep 27 20:09:19 2014 +0100
+++ b/stage4/generate_c/generate_c.cc	Sun Sep 28 16:35:44 2014 +0100
@@ -138,6 +138,11 @@
 #define GET_EXTERNAL_FB_REF "__GET_EXTERNAL_FB_REF"
 #define GET_LOCATED_REF "__GET_LOCATED_REF"
 
+#define GET_VAR_DREF "__GET_VAR_DREF"
+#define GET_EXTERNAL_DREF "__GET_EXTERNAL_DREF"
+#define GET_EXTERNAL_FB_DREF "__GET_EXTERNAL_FB_DREF"
+#define GET_LOCATED_DREF "__GET_LOCATED_DREF"
+
 #define GET_VAR_BY_REF "__GET_VAR_BY_REF"
 #define GET_EXTERNAL_BY_REF "__GET_EXTERNAL_BY_REF"
 #define GET_EXTERNAL_FB_BY_REF "__GET_EXTERNAL_FB_BY_REF"