Index: src/GenPoly/InstantiateGeneric.cc
===================================================================
--- src/GenPoly/InstantiateGeneric.cc	(revision 1d776fdacfdd4e1c1e1f7ae9e1b4a6bd650bf24e)
+++ src/GenPoly/InstantiateGeneric.cc	(revision 9a1e509e6ded571c2f6355253b2c7bfa0b4a2340)
@@ -171,5 +171,5 @@
 		Type* postmutate( UnionInstType *inst );
 
-		void premutate( FunctionType * ftype ) {
+		void premutate( __attribute__((unused)) FunctionType * ftype ) {
 			GuardValue( inFunctionType );
 			inFunctionType = true;