diff --git a/src/patterns.md b/src/patterns.md
index 8947467b0..b81d8dbdb 100644
--- a/src/patterns.md
+++ b/src/patterns.md
@@ -556,7 +556,7 @@ A struct pattern is refutable when one of its subpatterns is refutable.
 
 > **<sup>Syntax</sup>**\
 > _TupleStructPattern_ :\
-> &nbsp;&nbsp; [_PathInExpression_] `(` _TupleStructItems_ `)`
+> &nbsp;&nbsp; [_PathInExpression_] `(` _TupleStructItems_<sup>?</sup> `)`
 >
 > _TupleStructItems_ :\
 > &nbsp;&nbsp; &nbsp;&nbsp; [_Pattern_]&nbsp;( `,` [_Pattern_] )<sup>\*</sup> `,`<sup>?</sup>\