diff --git a/wp-content/themes/twentythirteen/style.css b/wp-content/themes/twentythirteen/style.css
index c455c65537..c573b66b49 100644
--- a/wp-content/themes/twentythirteen/style.css
+++ b/wp-content/themes/twentythirteen/style.css
@@ -971,7 +971,7 @@ ul.nav-menu .focus > ul,
 	position: relative;
 	-webkit-transition: width 400ms ease, background 400ms ease;
 	transition:         width 400ms ease, background 400ms ease;
-	width: 0;
+	width: 1px;
 }
 
 .site-header .search-field:focus {