diff --git a/docs/extensibility/parser.md b/docs/extensibility/parser.md
index 14533792355fb..c240aa62ff2d1 100644
--- a/docs/extensibility/parser.md
+++ b/docs/extensibility/parser.md
@@ -27,11 +27,11 @@ class EmptyParser {
   }
 }
 
-function select_empty_parser( $prev_parser_class ) {
+function my_plugin_select_empty_parser( $prev_parser_class ) {
     return 'EmptyParser';
 }
 
-add_filter( 'block_parser_class', select_empty_parser, 10, 1 );
+add_filter( 'block_parser_class', 'my_plugin_select_empty_parser', 10, 1 );
 ```
 
 > **Note**: At the present time it's not possible to replace the client-side parser.