diff --git a/wp-admin/js/updates.js b/wp-admin/js/updates.js
index 3139c3ef24..b03e4ba8f0 100644
--- a/wp-admin/js/updates.js
+++ b/wp-admin/js/updates.js
@@ -15,7 +15,7 @@ window.wp = window.wp || {};
 		$elem = $( '#wp-admin-bar-updates .ab-label' );
 		count = $elem.text();
 		count = parseInt( count, 10 ) - 1;
-		if ( count < 0 ) {
+		if ( count < 0 || isNaN( count ) ) {
 			return;
 		}
 		$( '#wp-admin-bar-updates .ab-item' ).removeAttr( 'title' );
@@ -32,7 +32,7 @@ window.wp = window.wp || {};
 			$elem = $( '#menu-plugins' );
 			pluginCount = $elem.find( '.plugin-count' ).eq(0).text();
 			pluginCount = parseInt( pluginCount, 10 ) - 1;
-			if ( pluginCount < 0 ) {
+			if ( pluginCount < 0 || isNaN( pluginCount ) ) {
 				return;
 			}
 			$elem.find( '.plugin-count' ).text( pluginCount );
diff --git a/wp-admin/js/updates.min.js b/wp-admin/js/updates.min.js
index 63068b198c..660d1e25eb 100644
--- a/wp-admin/js/updates.min.js
+++ b/wp-admin/js/updates.min.js
@@ -1 +1 @@
-window.wp=window.wp||{},function(a,b){b.updates={},b.updates.decrementCount=function(b){var c,d,e;if(e=a("#wp-admin-bar-updates .ab-label"),c=e.text(),c=parseInt(c,10)-1,!(0>c)&&(a("#wp-admin-bar-updates .ab-item").removeAttr("title"),e.text(c),e=a('a[href="update-core.php"] .update-plugins'),e.each(function(a,b){b.className=b.className.replace(/count-\d+/,"count-"+c)}),e.removeAttr("title"),e.find(".update-count").text(c),"plugin"===b)){if(e=a("#menu-plugins"),d=e.find(".plugin-count").eq(0).text(),d=parseInt(d,10)-1,0>d)return;e.find(".plugin-count").text(d),e.find(".update-plugins").each(function(a,b){b.className=b.className.replace(/count-\d+/,"count-"+d)})}},a(window).on("message",function(c){var d,e=c.originalEvent,f=document.location,g=f.protocol+"//"+f.hostname;e.origin===g&&(d=a.parseJSON(e.data),"undefined"!=typeof d.action&&"decrementUpdateCount"===d.action&&b.updates.decrementCount(d.upgradeType))})}(jQuery,window.wp);
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+window.wp=window.wp||{},function(a,b){b.updates={},b.updates.decrementCount=function(b){var c,d,e;if(e=a("#wp-admin-bar-updates .ab-label"),c=e.text(),c=parseInt(c,10)-1,!(0>c||isNaN(c))&&(a("#wp-admin-bar-updates .ab-item").removeAttr("title"),e.text(c),e=a('a[href="update-core.php"] .update-plugins'),e.each(function(a,b){b.className=b.className.replace(/count-\d+/,"count-"+c)}),e.removeAttr("title"),e.find(".update-count").text(c),"plugin"===b)){if(e=a("#menu-plugins"),d=e.find(".plugin-count").eq(0).text(),d=parseInt(d,10)-1,0>d||isNaN(d))return;e.find(".plugin-count").text(d),e.find(".update-plugins").each(function(a,b){b.className=b.className.replace(/count-\d+/,"count-"+d)})}},a(window).on("message",function(c){var d,e=c.originalEvent,f=document.location,g=f.protocol+"//"+f.hostname;e.origin===g&&(d=a.parseJSON(e.data),"undefined"!=typeof d.action&&"decrementUpdateCount"===d.action&&b.updates.decrementCount(d.upgradeType))})}(jQuery,window.wp);
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