diff --git a/doc/regexp.rdoc b/doc/regexp.rdoc
index 23fe7113b9..6aa11b0c5a 100644
--- a/doc/regexp.rdoc
+++ b/doc/regexp.rdoc
@@ -405,6 +405,7 @@ much like POSIX bracket classes.
* /\p{Blank}/ - Space or tab
* /\p{Cntrl}/ - Control character
* /\p{Digit}/ - Digit
+* /\p{Emoji}/ - Unicode emoji
* /\p{Graph}/ - Non-blank character (excludes spaces, control
characters, and similar)
* /\p{Lower}/ - Lowercase alphabetical character