@@ -940,18 +940,14 @@
 		return (number.longLongValue == self.longLongValue);
 
 	return (number.unsignedLongLongValue == self.unsignedLongLongValue);
 }
 
-- (of_comparison_result_t)compare: (id <OFComparing>)object
-{
-	OFNumber *number;
-
-	if (![(id)object isKindOfClass: [OFNumber class]])
-		@throw [OFInvalidArgumentException exception];
-
-	number = (OFNumber *)object;
+- (of_comparison_result_t)compare: (OFNumber *)number
+{
+	if (![number isKindOfClass: [OFNumber class]])
+		@throw [OFInvalidArgumentException exception];
 
 	if (isFloat(self) || isFloat(number)) {
 		double double1 = self.doubleValue;
 		double double2 = number.doubleValue;