diff --git a/doc/sdk/http-transformation-plugin/sample-null-transformation-plugin.en.rst b/doc/sdk/http-transformation-plugin/sample-null-transformation-plugin.en.rst
index 91f76122c9e..b8799e11452 100644
--- a/doc/sdk/http-transformation-plugin/sample-null-transformation-plugin.en.rst
+++ b/doc/sdk/http-transformation-plugin/sample-null-transformation-plugin.en.rst
@@ -103,7 +103,7 @@ Below is an overview of the null transform plugin:
     ::
 
         :::c
-        output_conn = TSTransformOutputVConnGet (con
+        output_conn = TSTransformOutputVConnGet (contp);
 
 5.  Get a handle to the input VIO. (See the ``handle_transform``
     function.)