diff --git a/lib/ransack/adapters/active_record/ransack/nodes/condition.rb b/lib/ransack/adapters/active_record/ransack/nodes/condition.rb
index fb0210d..7432f19 100644
--- a/lib/ransack/adapters/active_record/ransack/nodes/condition.rb
+++ b/lib/ransack/adapters/active_record/ransack/nodes/condition.rb
@@ -18,6 +18,7 @@ module Ransack
             predicates.inject(&:or)
           end
         else
+          predicates.first.right[0] = predicates.first.right[0].val if predicates.first.right[0].class == Arel::Nodes::Casted
           predicates.first
         end
       end