diff --git a/C4/Auth.pm b/C4/Auth.pm
index 34c3f91ffe..268ef3544b 100644
--- a/C4/Auth.pm
+++ b/C4/Auth.pm
@@ -159,7 +159,7 @@ sub get_template_and_user {
     C4::Context->interface( $in->{type} );
 
     my $safe_chars = 'a-zA-Z0-9_\-\/';
-    die "bad template path" unless $in->{'template_name'} =~ m/^[$safe_chars]+.tt?$/ig; #sanitize input
+    die "bad template path" unless $in->{'template_name'} =~ m/^[$safe_chars]+\.tt$/ig; #sanitize input
 
     $in->{'authnotrequired'} ||= 0;
     my $template = C4::Templates::gettemplate(