diff --git a/DOCS/man/en/mplayer.1 b/DOCS/man/en/mplayer.1
index 245569f1a4..9537b01c6c 100644
--- a/DOCS/man/en/mplayer.1
+++ b/DOCS/man/en/mplayer.1
@@ -2484,6 +2484,8 @@ packed YUV output format, with e.g.\& \-vf format=yuy2.
 .RSs
 .IPs device_id=<number>
 Choose the display device to use in fullscreen.
+.IPs fs_res=<width>:<height>
+Choose the screen resolution to use in fullscreen (useful on slower system).
 .RE
 .PD 1
 .