Index: src/GenPoly/InstantiateGeneric.cc
===================================================================
--- src/GenPoly/InstantiateGeneric.cc	(revision 2a7b3ca400fe85559a7ebbd5d3b09859d5dfc4da)
+++ src/GenPoly/InstantiateGeneric.cc	(revision e60e0dc41c51d3729b99dd9bd3c6864794d982ce)
@@ -171,5 +171,5 @@
 		Type* postmutate( UnionInstType *inst );
 
-		void premutate( FunctionType * ftype ) {
+		void premutate( __attribute__((unused)) FunctionType * ftype ) {
 			GuardValue( inFunctionType );
 			inFunctionType = true;