Index: src/OFTimer.m
==================================================================
--- src/OFTimer.m
+++ src/OFTimer.m
@@ -341,11 +341,11 @@
 	return [fireDate compare: otherTimer->fireDate];
 }
 
 - (void)fire
 {
-	OF_ENSURE(arguments >= 0 && arguments <= 2);
+	OF_ENSURE(arguments <= 2);
 
 #ifdef OF_HAVE_BLOCKS
 	if (block != NULL)
 		block(self);
 	else {