diff --git a/lib/image_vise/pipeline.rb b/lib/image_vise/pipeline.rb
index 4d8ee9b..96a2c4d 100644
--- a/lib/image_vise/pipeline.rb
+++ b/lib/image_vise/pipeline.rb
@@ -27,14 +27,12 @@ def empty?
     @ops.empty?
   end
 
-  if RUBY_VERSION.start_with?("2.6")
-    def method_missing(method_name, *args, &blk)
-      operator_builder = ImageVise.operator_from(method_name)
+  def method_missing(method_name, args = {}, &blk)
+    operator_builder = ImageVise.operator_from(method_name)
+
+    if RUBY_VERSION.start_with?("2.6") # TODO: remove after dropping Ruby 2.6 support
       self << operator_builder.new(*args)
-    end
-  else
-    def method_missing(method_name, args = {}, &blk)
-      operator_builder = ImageVise.operator_from(method_name)
+    else
       self << operator_builder.new(**args)
     end
   end