diff --git a/doc/test_xr.txt b/doc/test_xr.txt
index baaaaba2..6e20e209 100644
--- a/doc/test_xr.txt
+++ b/doc/test_xr.txt
@@ -108,6 +108,8 @@ rofi.scroll-method:                  0
 ! rofi.color-window:                   
 ! "Directory containing plugins" Set from: File
 rofi.plugin-path:                    /usr/lib/rofi
+! "Max history size (WARNING: can cause slowdowns when set to high)." Set from: Default
+! rofi.max-history-size:               25
 ! "Pidfile location" Set from: File
 rofi.pid:                            /tmp/rofi.pid
 ! "Paste primary selection" Set from: File