diff --git a/doc/strscan/strscan.md b/doc/strscan/strscan.md
index c4ab203462..385e92f84e 100644
--- a/doc/strscan/strscan.md
+++ b/doc/strscan/strscan.md
@@ -417,7 +417,7 @@ Each of these methods returns a captured match value:
 | Method          | Return After Match                      | Return After No Match |
 |-----------------|-----------------------------------------|-----------------------|
 | #size           | Count of captured substrings.           | +nil+.                |
-| #[](n)          | <tt>n</tt>th captured substring.        | +nil+.                |
+| #\[\](n)        | <tt>n</tt>th captured substring.        | +nil+.                |
 | #captures       | Array of all captured substrings.       | +nil+.                |
 | #values_at(*n)  | Array of specified captured substrings. | +nil+.                |
 | #named_captures | Hash of named captures.                 | <tt>{}</tt>.          |