diff --git a/ppf.py b/ppf.py
index 2826f3e..ab0e600 100755
--- a/ppf.py
+++ b/ppf.py
@@ -183,7 +183,7 @@ if __name__ == '__main__':
 	while True:
 		try:
 			## any site that needs to be checked ?
-			rows = [ [i[0],i[1],i[2]] for i in sqlite.execute('SELECT url,hash,error FROM uris WHERE (check_time+?+(error*?) <?) ORDER BY RANDOM() LIMIT 25', (config.checktime, config.perfail_checktime, time.time())).fetchall() ]
+			rows = [ [i[0],i[1],i[2]] for i in sqlite.execute('SELECT url,hash,error FROM uris WHERE (check_time+?+(error*?) <?) ORDER BY RANDOM() LIMIT 25', (config.url_checktime, config.url_perfail_checktime, time.time())).fetchall() ]
 
 			if len(rows): proxyleech(sqlite,rows)
 			## search for new website during free time