diff --git a/reference/docs-conceptual/lang-spec/chapter-02.md b/reference/docs-conceptual/lang-spec/chapter-02.md
index 573316031592..ae07fc8c7113 100644
--- a/reference/docs-conceptual/lang-spec/chapter-02.md
+++ b/reference/docs-conceptual/lang-spec/chapter-02.md
@@ -644,7 +644,7 @@ hexadecimal-integer-literal:
 
 hexadecimal-digits:
     hexadecimal-digit
-    hexadecimal-digit decimal-digits
+    hexadecimal-digit hexadecimal-digits
 
 hexadecimal-digit: one of
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f