diff --git a/sc2/src/sc2code/commglue.c b/sc2/src/sc2code/commglue.c
index b6ee9d8b8..5000c4c84 100644
--- a/sc2/src/sc2code/commglue.c
+++ b/sc2/src/sc2code/commglue.c
@@ -232,7 +232,7 @@ GetAllianceName (UNICODE *buf, RESPONSE_REF name_1)
 }
 
 void
-construct_response (UNICODE *buf, RESPONSE_REF R, ...)
+construct_response (UNICODE *buf, int R /* promoted from RESPONSE_REF */, ...)
 {
 	UNICODE *name;
 	va_list vlist;
diff --git a/sc2/src/sc2code/commglue.h b/sc2/src/sc2code/commglue.h
index 429951ac2..1f42ea048 100644
--- a/sc2/src/sc2code/commglue.h
+++ b/sc2/src/sc2code/commglue.h
@@ -60,7 +60,8 @@ extern void NPCPhrase_cb (int index, void (*cb) (void));
 
 extern void GetAllianceName (UNICODE *buf, RESPONSE_REF name_1);
 
-extern void construct_response (UNICODE *buf, RESPONSE_REF R, ...);
+extern void construct_response (UNICODE *buf, int R /* promoted from
+		RESPONSE_REF */, ...);
 
 extern LOCDATAPTR init_race (RESOURCE comm_id);