diff --git a/dir.c b/dir.c
index 8492ce78d0327b..4fe2c8832feea4 100644
--- a/dir.c
+++ b/dir.c
@@ -906,6 +906,7 @@ rb_dir_getwd(void)
  *
  *     Dir.chdir("/tmp")   #=> 0
  *     Dir.getwd           #=> "/tmp"
+ *     Dir.pwd             #=> "/tmp"
  */
 static VALUE
 dir_s_getwd(VALUE dir)