@@ -163,12 +163,11 @@
 	if (length == 0)
 		return;
 
 	if (_calculated)
 		@throw [OFHashAlreadyCalculatedException
-		    exceptionWithClass: [self class]
-				  hash: self];
+		    exceptionWithHash: self];
 
 	sha1_update(_state, &_count, _buffer, buffer, length);
 }
 
 - (uint8_t*)digest