diff --git a/lib/vips/operation.rb b/lib/vips/operation.rb
index aebe598..7d58bc1 100644
--- a/lib/vips/operation.rb
+++ b/lib/vips/operation.rb
@@ -218,7 +218,7 @@ def initialize value
         raise Vips::Error if value.null?
       end
 
-      super(value)
+      super
     end
 
     def build