diff --git a/doc/src/lexer_tutorial/001_lexer_gen.md b/doc/src/lexer_tutorial/001_lexer_gen.md
index af4725bca..62bebc207 100644
--- a/doc/src/lexer_tutorial/001_lexer_gen.md
+++ b/doc/src/lexer_tutorial/001_lexer_gen.md
@@ -330,7 +330,7 @@ To this end `ignore patterns` can be specified.
 match {
     r"\s*" => { }, // The default whitespace skipping is disabled an `ignore pattern` is specified
     r"//[^\n\r]*[\n\r]*" => { }, // Skip `// comments`
-    r"/\*([^\*]*\*+[^\*/])*([^\*]*\*+|[^\*])*\*/" => { },  // Skip `/* comments */`
+    r"/\*[^*]*\*+(?:[^/*][^*]*\*+)*/" => { },  // Skip `/* comments */`
 }
 ```