diff --git a/system/admin/views/add-content.html.php b/system/admin/views/add-content.html.php
index 187b21b6..f00df987 100644
--- a/system/admin/views/add-content.html.php
+++ b/system/admin/views/add-content.html.php
@@ -47,7 +47,7 @@ function extractLast( term ) {
     $( "#pTag" )
       // don't navigate away from the field on tab when selecting an item
       .on( "keydown", function( event ) {
-        if ( event.keyCode === $.ui.keyCode.TAB &&
+        if ( event.keyCode === 9 && // 9 = tab
             $( this ).autocomplete( "instance" ).menu.active ) {
           event.preventDefault();
         }
diff --git a/system/admin/views/edit-content.html.php b/system/admin/views/edit-content.html.php
index d47b7754..e4cdf329 100644
--- a/system/admin/views/edit-content.html.php
+++ b/system/admin/views/edit-content.html.php
@@ -92,7 +92,7 @@ function extractLast( term ) {
     $( "#pTag" )
       // don't navigate away from the field on tab when selecting an item
       .on( "keydown", function( event ) {
-        if ( event.keyCode === $.ui.keyCode.TAB &&
+        if ( event.keyCode === 9 && // 9 = tab
             $( this ).autocomplete( "instance" ).menu.active ) {
           event.preventDefault();
         }