diff --git a/lib/cocoapods-user-defined-build-types/private_api_hooks.rb b/lib/cocoapods-user-defined-build-types/private_api_hooks.rb
index 52c0ae1..37c95cb 100644
--- a/lib/cocoapods-user-defined-build-types/private_api_hooks.rb
+++ b/lib/cocoapods-user-defined-build-types/private_api_hooks.rb
@@ -27,7 +27,7 @@ def self.root_pod_building_options
 
         if options.is_a?(Hash)
           options.each do |k,v|
-            next if not options.key?(Pod::UserOption.keyword)
+            next if k != Pod::UserOption.keyword
              
             user_build_type = options.delete(k)
             if Pod::UserOption.keyword_mapping.key?(user_build_type)