@@ -33,9 +33,10 @@
 	else
 		OBJC_ERROR("Object was mutated during enumeration!");
 }
 
 void
-objc_setEnumerationMutationHandler(void (*handler)(id))
+objc_setEnumerationMutationHandler(
+    objc_enumeration_mutation_handler handler OBJC_M68K_REG("a0"))
 {
 	enumeration_mutation_handler = handler;
 }