1 files changed, 4 insertions, 3 deletions
diff --git a/actionpack/lib/action_dispatch/http/request.rb b/actionpack/lib/action_dispatch/http/request.rb
index 452809a689..31b36eedb0 100644
--- a/actionpack/lib/action_dispatch/http/request.rb
+++ b/actionpack/lib/action_dispatch/http/request.rb
@@ -276,15 +276,14 @@ module ActionDispatch
       LOCALHOST =~ remote_addr && LOCALHOST =~ remote_ip
     end
 
-    protected
-
     # Remove nils from the params hash
     def deep_munge(hash)
-      hash.each_value do |v|
+      hash.each do |k, v|
         case v
         when Array
           v.grep(Hash) { |x| deep_munge(x) }
           v.compact!
+          hash[k] = nil if v.empty?
         when Hash
           deep_munge(v)
         end
@@ -293,6 +292,8 @@ module ActionDispatch
       hash
     end
 
+    protected
+
     def parse_query(qs)
       deep_munge(super)
     end