diff --git a/scripts/mysql_create_system_tables.sh b/scripts/mysql_create_system_tables.sh
index 5fad3222682..03c148267fd 100644
--- a/scripts/mysql_create_system_tables.sh
+++ b/scripts/mysql_create_system_tables.sh
@@ -42,6 +42,7 @@ i_ht=""
 c_tzn="" c_tz="" c_tzt="" c_tztt="" c_tzls="" c_pl=""
 i_tzn="" i_tz="" i_tzt="" i_tztt="" i_tzls="" i_pl=""
 c_p="" c_pp=""
+c_ev= ""
 
 # Check for old tables
 if test ! -f $mdata/db.frm