@@ -107,10 +107,14 @@
 objc_enumerationMutation(id object)
 {
 	enumeration_mutation_handler(object);
 }
 #endif
+
+#if defined(HAVE_OBJC_ENUMERATIONMUTATION) && defined(OF_OLD_GNU_RUNTIME)
+extern void objc_setEnumerationMutationHandler(void(*handler)(id));
+#endif
 
 const char*
 _NSPrintForDebugger(id object)
 {
 	return [[object description] cString];
@@ -170,11 +174,11 @@
 		    stderr);
 		abort();
 	}
 #endif
 
-#if defined(OF_APPLE_RUNTIME) || defined(OF_GNU_RUNTIME)
+#ifdef HAVE_OBJC_ENUMERATIONMUTATION
 	objc_setEnumerationMutationHandler(enumeration_mutation_handler);
 #endif
 
 	cxx_construct = sel_registerName(".cxx_construct");
 	cxx_destruct = sel_registerName(".cxx_destruct");