diff --git a/lib/sinatra/base.rb b/lib/sinatra/base.rb
index 9cf465ca..e299267c 100644
--- a/lib/sinatra/base.rb
+++ b/lib/sinatra/base.rb
@@ -376,6 +376,8 @@ module Sinatra
           splat = key.scan(/(^[^\[]+)|\[([^\]]+)\]/).flatten.compact
           head, last = splat[0..-2], splat[-1]
           head.inject(res){ |s,v| s[v] ||= indifferent_hash }[last] = val
+        else
+          res[key] = val
         end
         res
       end
diff --git a/test/routing_test.rb b/test/routing_test.rb
index 6ee5eeae..21753153 100644
--- a/test/routing_test.rb
+++ b/test/routing_test.rb
@@ -176,6 +176,21 @@ describe "Routing" do
     assert_equal 'looks good', body
   end
 
+  it "preserves non-nested params" do
+    mock_app {
+      get '/foo' do
+        assert_equal "2", params["article_id"]
+        assert_equal "awesome", params['comment']['body']
+        assert_nil params['comment[body]']
+        'looks good'
+      end
+    }
+
+    get '/foo?article_id=2&comment[body]=awesome'
+    assert ok?
+    assert_equal 'looks good', body
+  end
+
   it "supports paths that include spaces" do
     mock_app {
       get '/path with spaces' do