Index: branches/5.1.x/core/install/install_schema.sql
===================================================================
diff -u -N -r13470 -r13545
--- branches/5.1.x/core/install/install_schema.sql	(.../install_schema.sql)	(revision 13470)
+++ branches/5.1.x/core/install/install_schema.sql	(.../install_schema.sql)	(revision 13545)
@@ -510,7 +510,8 @@
   ACL varchar(255) NOT NULL default '',
   PRIMARY KEY  (PermCacheId),
   KEY CategoryId (CategoryId),
-  KEY PermId (PermId)
+  KEY PermId (PermId),
+  KEY ACL (ACL)
 );
 
 CREATE TABLE Stylesheets (