diff --git a/packages/ostruct-sanitizer/lib/ostruct/sanitizer.rb b/packages/ostruct-sanitizer/lib/ostruct/sanitizer.rb
index 952d44e5..8957aba5 100644
--- a/packages/ostruct-sanitizer/lib/ostruct/sanitizer.rb
+++ b/packages/ostruct-sanitizer/lib/ostruct/sanitizer.rb
@@ -28,7 +28,7 @@ def self.included(base)
     # Initializes the OpenStruct applying any registered sanitization rules
     #
     def initialize(attrs = {})
-      super nil
+      super(nil)
       attrs.each_pair do |field, value|
         self[field] = value
       end
@@ -43,7 +43,7 @@ def initialize(attrs = {})
     def method_missing(method, *args)
       # Give OpenStruct a chance to create getters and setters for the
       # corresponding field
-      super method, *args
+      super(method, *args)
 
       return unless (field = setter?(method))