diff --git a/edithelp.pl b/edithelp.pl
index 5cde3149d4..3c7a985680 100755
--- a/edithelp.pl
+++ b/edithelp.pl
@@ -65,7 +65,9 @@ my ( $template, $loggedinuser, $cookie ) = get_template_and_user(
 sub _get_filepath ($;$) {
     my $referer = shift;
     $referer =~ /koha\/(.*)\.pl/;
-    my $from = "help/$1.tt";
+    my $file = $1;
+    $file =~ s/[^0-9a-zA-Z_\-\/]*//g;
+    my $from = "help/$file.tt";
     my $htdocs = C4::Context->config('intrahtdocs');
     my ($theme, $lang) = C4::Templates::themelanguage( $htdocs, $from, "intranet", $input );
 	$debug and print STDERR "help filepath: $htdocs/$theme/$lang/modules/$from";