diff --git a/src/wp-includes/js/tinymce/plugins/wplink/plugin.js b/src/wp-includes/js/tinymce/plugins/wplink/plugin.js
index f2a9432ab8..0083c1b28d 100644
--- a/src/wp-includes/js/tinymce/plugins/wplink/plugin.js
+++ b/src/wp-includes/js/tinymce/plugins/wplink/plugin.js
@@ -348,6 +348,7 @@
 						},
 						focus: function( event, ui ) {
 							$input.attr( 'aria-activedescendant', 'mce-wp-autocomplete-' + ui.item.ID );
+							event.preventDefault();
 						},
 						select: function( event, ui ) {
 							$input.val( ui.item.permalink );
diff --git a/src/wp-includes/js/wplink.js b/src/wp-includes/js/wplink.js
index d541f26086..27505b81d4 100644
--- a/src/wp-includes/js/wplink.js
+++ b/src/wp-includes/js/wplink.js
@@ -76,6 +76,7 @@ var wpLink;
 				},
 				focus: function( event, ui ) {
 					$input.attr( 'aria-activedescendant', 'mce-wp-autocomplete-' + ui.item.ID );
+					event.preventDefault();
 				},
 				select: function( event, ui ) {
 					$input.val( ui.item.permalink );