diff --git a/src/wp-content/themes/twentyfifteen/js/functions.js b/src/wp-content/themes/twentyfifteen/js/functions.js
index 9adad87e39..2da5cbc340 100644
--- a/src/wp-content/themes/twentyfifteen/js/functions.js
+++ b/src/wp-content/themes/twentyfifteen/js/functions.js
@@ -49,7 +49,7 @@
 	// Enable menu toggle for small screens.
 	( function() {
 		var menu, widgets, social;
-		if ( ! secondary || ! button ) {
+		if ( ! secondary.length || ! button.length ) {
 			return;
 		}
 
@@ -57,7 +57,7 @@
 		menu    = secondary.find( '.nav-menu' );
 		widgets = secondary.find( '#widget-area' );
 		social  = secondary.find( '#social-navigation' );
-		if ( ! widgets.length && ! social.length && ( ! menu || ! menu.children().length ) ) {
+		if ( ! widgets.length && ! social.length && ( ! menu.length || ! menu.children().length ) ) {
 			button.hide();
 			return;
 		}
diff --git a/src/wp-content/themes/twentyfourteen/js/functions.js b/src/wp-content/themes/twentyfourteen/js/functions.js
index 603e1379a0..1355204308 100644
--- a/src/wp-content/themes/twentyfourteen/js/functions.js
+++ b/src/wp-content/themes/twentyfourteen/js/functions.js
@@ -16,12 +16,12 @@
 
 	// Enable menu toggle for small screens.
 	( function() {
-		if ( ! nav || ! button ) {
+		if ( ! nav.length || ! button.length ) {
 			return;
 		}
 
 		// Hide button if menu is missing or empty.
-		if ( ! menu || ! menu.children().length ) {
+		if ( ! menu.length || ! menu.children().length ) {
 			button.hide();
 			return;
 		}
diff --git a/src/wp-content/themes/twentythirteen/js/functions.js b/src/wp-content/themes/twentythirteen/js/functions.js
index fa8160d53a..d1528557bf 100644
--- a/src/wp-content/themes/twentythirteen/js/functions.js
+++ b/src/wp-content/themes/twentythirteen/js/functions.js
@@ -34,12 +34,12 @@
 	 * Enables menu toggle for small screens.
 	 */
 	( function() {
-		if ( ! nav || ! button ) {
+		if ( ! nav.length || ! button.length ) {
 			return;
 		}
 
 		// Hide button if menu is missing or empty.
-		if ( ! menu || ! menu.children().length ) {
+		if ( ! menu.length || ! menu.children().length ) {
 			button.hide();
 			return;
 		}