diff --git a/README.md b/README.md
index 8e1b4d4..7e48f65 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Dependencies :
 * libcairo
     
 Launch args :
-* -l : sets a frame divider to limit the framerate, (example l=2 -> run at 30Hz if X is running at 60Hz).
+* -l <uint> : sets a frame divider to limit the framerate, (example `./test -l 2` -> run at 30Hz if X is running at 60Hz).
 * -a : async mode, update the animation as fast as possible without waiting for vblank
 
 Controls: