diff --git a/js/id/ui/map_in_map.js b/js/id/ui/map_in_map.js
index e93282ed4..a0e012306 100644
--- a/js/id/ui/map_in_map.js
+++ b/js/id/ui/map_in_map.js
@@ -1,5 +1,5 @@
 iD.ui.MapInMap = function(context) {
-    var key = 'M';
+    var key = '/';
 
     function map_in_map(selection) {
         var backgroundLayer = iD.TileLayer(),