diff --git a/cataloguing/value_builder/marc21_field_006.pl b/cataloguing/value_builder/marc21_field_006.pl
index 658af3ed1e..c8718ecb0f 100755
--- a/cataloguing/value_builder/marc21_field_006.pl
+++ b/cataloguing/value_builder/marc21_field_006.pl
@@ -37,7 +37,7 @@ my $builder = sub {
 
 function Click$function_name(event) {
     defaultvalue=document.getElementById(event.data.id).value;
-    newin=window.open(\"../cataloguing/plugin_launcher.pl?plugin_name=marc21_field_006.pl&index=\"+ event.data.id +\"&result=\"+defaultvalue,\"tag_editor\",'width=1000,height=600,toolbar=false,scrollbars=yes');
+    newin=window.open(\"../cataloguing/plugin_launcher.pl?plugin_name=marc21_field_006.pl&index=\"+ event.data.id +\"&result=\"+encodeURIComponent(defaultvalue),\"tag_editor\",'width=1000,height=600,toolbar=false,scrollbars=yes');
 
 }
 </script>