diff --git a/lib/ransack/nodes/grouping.rb b/lib/ransack/nodes/grouping.rb
index 1bf70550..744b6669 100644
--- a/lib/ransack/nodes/grouping.rb
+++ b/lib/ransack/nodes/grouping.rb
@@ -149,7 +149,7 @@ def new_grouping(params = {})
       def build(params)
         params.with_indifferent_access.each do |key, value|
           case key
-          when /^(g|c|m)$/
+          when /^(g|c|m|groupings|conditions|combinator)$/
             self.send("#{key}=", value)
           else
             write_attribute(key.to_s, value)