diff --git a/sql/rottenlinks.sql b/sql/rottenlinks.sql
index c76bcd1..61d0df0 100644
--- a/sql/rottenlinks.sql
+++ b/sql/rottenlinks.sql
@@ -6,7 +6,7 @@ CREATE TABLE /*_*/rottenlinks (
   `rl_respcode` INT UNSIGNED NOT NULL
 )/*$wgDBTableOptions*/;
 
-CREATE INDEX /*i*/rl_externallink ON /*_*/rottenlinks (rl_externallink(50));
+CREATE INDEX /*i*/rl_externallink ON /*_*/rottenlinks (rl_externallink);
 CREATE INDEX /*i*/rl_respcode ON /*_*/rottenlinks (rl_respcode);
 
 COMMIT;