@@ -504,18 +504,14 @@
 #endif
 
 	[super dealloc];
 }
 
-- (of_comparison_result_t)compare: (id <OFComparing>)object
-{
-	OFTimer *timer;
-
-	if (![(id)object isKindOfClass: [OFTimer class]])
-		@throw [OFInvalidArgumentException exception];
-
-	timer = (OFTimer *)object;
+- (of_comparison_result_t)compare: (OFTimer *)timer
+{
+	if (![timer isKindOfClass: [OFTimer class]])
+		@throw [OFInvalidArgumentException exception];
 
 	return [_fireDate compare: timer->_fireDate];
 }
 
 - (void)of_setInRunLoop: (OFRunLoop *)runLoop mode: (of_run_loop_mode_t)mode