Index: src/CodeGen/GenType.cc
===================================================================
--- src/CodeGen/GenType.cc	(revision da6dec232c95859faf2a393b55c14905e0facf66)
+++ src/CodeGen/GenType.cc	(revision 6d4d1a6cb61ef1c5bd941a1240e54345831e261e)
@@ -41,4 +41,5 @@
 		virtual void visit( EnumInstType *enumInst );
 		virtual void visit( TypeInstType *typeInst );
+		virtual void visit( TupleType * tupleType );
 		virtual void visit( VarArgsType *varArgsType );
 		virtual void visit( ZeroType *zeroType );
@@ -197,4 +198,9 @@
 	}
 
+	void GenType::visit( TupleType * tupleType ) {
+		assertf( ! mangle, "Tuple types should not make it to Code Gen." );
+		Visitor::visit( tupleType );
+	}
+
 	void GenType::visit( VarArgsType *varArgsType ) {
 		typeString = "__builtin_va_list " + typeString;