diff --git a/red/api/ui.js b/red/api/ui.js
index 1654a2838..fa35eac4f 100644
--- a/red/api/ui.js
+++ b/red/api/ui.js
@@ -31,8 +31,11 @@ events.on("node-icon-dir",function(dir) {
 
 module.exports = {
     ensureSlash: function(req,res,next) {
-        if (req.originalUrl.slice(-1) != "/") {
-            res.redirect(301,req.originalUrl+"/");
+        var parts = req.originalUrl.split("?");
+        if (parts[0].slice(-1) != "/") {
+            parts[0] += "/";
+            var redirect = parts.join("?");
+            res.redirect(301,redirect);
         } else {
             next();
         }
diff --git a/test/red/api/ui_spec.js b/test/red/api/ui_spec.js
index 139a1aa22..920e9bf9e 100644
--- a/test/red/api/ui_spec.js
+++ b/test/red/api/ui_spec.js
@@ -39,6 +39,19 @@ describe("ui api", function() {
                 .get('/foo')
                 .expect(301,done);
         });
+        it('redirects if the path, with query string, does not end in a slash',function(done) {
+            request(app)
+                .get('/foo?abc=def')
+                .expect(301)
+                .end(function(err,res) {
+                    if (err) {
+                        return done(err);
+                    }
+                    res.header['location'].should.equal("/foo/?abc=def");
+                    done();
+                });
+        });
+
         it('does not redirect if the path ends in a slash',function(done) {
             request(app)
                 .get('/foo/')