Index: src/OFObject.m
==================================================================
--- src/OFObject.m
+++ src/OFObject.m
@@ -45,20 +45,24 @@
 } alloc_failed_exception;
 
 #ifdef NEED_OBJC_SYNC_INIT
 extern BOOL objc_sync_init();
 #endif
+
+static void
+enumeration_mutation_handler(id obj)
+{
+	@throw [OFEnumerationMutationException newWithClass: [obj class]];
+}
 
 #ifndef HAVE_OBJC_ENUMERATIONMUTATION
-#define enumeration_mutation_handler objc_enumerationMutation
-#endif
-
 void
-enumeration_mutation_handler(id object)
+objc_enumerationMutation(id obj)
 {
-	@throw [OFEnumerationMutationException newWithClass: [object class]];
+	enumeration_mutation_handler(obj);
 }
+#endif
 
 @implementation OFObject
 + (void)load
 {
 #ifdef NEED_OBJC_SYNC_INIT