@@ -115,18 +115,20 @@
 	return common_method_not_found(obj, sel, objc_msg_lookup_stret,
 	    forward_handler_stret);
 }
 
 void
-objc_setForwardHandler(IMP forward, IMP forward_stret)
+objc_setForwardHandler(IMP forward OBJC_M68K_REG("a0"),
+    IMP forward_stret OBJC_M68K_REG("a1"))
 {
 	forward_handler = forward;
 	forward_handler_stret = forward_stret;
 }
 
 bool
-class_respondsToSelector(Class cls, SEL sel)
+class_respondsToSelector(Class cls OBJC_M68K_REG("a0"),
+    SEL sel OBJC_M68K_REG("a1"))
 {
 	if (cls == Nil)
 		return false;
 
 	return (objc_dtable_get(cls->dtable, (uint32_t)sel->uid) != (IMP)0);