diff --git a/installer/data/mysql/updatedatabase.pl b/installer/data/mysql/updatedatabase.pl
index 17e93d556a..085a948593 100755
--- a/installer/data/mysql/updatedatabase.pl
+++ b/installer/data/mysql/updatedatabase.pl
@@ -10790,13 +10790,13 @@ if ( CheckVersion($DBversion) ) {
     SetVersion($DBversion);
 }
 
-$$DBversion = "3.20.12.000";
+$DBversion = "3.20.12.000";
 if ( CheckVersion($DBversion) ) {
     print "Upgrade to $DBversion done (Koha 3.20.12)\n";
     SetVersion($DBversion);
 }
 
-DBversion = "3.20.13.000";
+$DBversion = "3.20.13.000";
 if ( CheckVersion($DBversion) ) {
     print "Upgrade to $DBversion done (Koha 3.20.13)\n";
     SetVersion($DBversion);