diff --git a/admin/javascript/LeftAndMain.js b/admin/javascript/LeftAndMain.js
index 1134714c0..387ece8f9 100644
--- a/admin/javascript/LeftAndMain.js
+++ b/admin/javascript/LeftAndMain.js
@@ -670,7 +670,7 @@ jQuery.noConflict();
 			showDetailView: function(url) {
 				// Include any GET parameters from the current URL, as the view state might depend on it.
 				// For example, a list prefiltered through external search criteria might be passed to GridField.
-				if(window.location.search) url += window.location.search;
+				url = $.path.addSearchParams(url, window.location.search.replace(/^\?/, ''));
 				$('.cms-container').loadPanel(url);
 			}
 		});