diff --git a/lib/core/mount.js b/lib/core/mount.js
index 506bc63a8a..c1e08b8b1e 100644
--- a/lib/core/mount.js
+++ b/lib/core/mount.js
@@ -225,7 +225,7 @@ function mount(mountPath, parentApp, events) {
 	if (mountPath) {
 		//fix root-relative keystone urls for assets (gets around having to re-write all the keystone templates)
 		parentApp.all(/^\/keystone($|\/.*)/, function(req, res, next) {
-			req.url = mountPath + req.url;
+			req.url = (mountPath + req.url).replace(new RegExp(/\/\//, 'g'), '/');
 			next();
 		});