diff --git a/balls.c b/balls.c
index 4e8b3d9..2e3444f 100644
--- a/balls.c
+++ b/balls.c
@@ -252,7 +252,7 @@ void print_usage (const char * progname) {
 	    "\tradius=<min-radius>-<max-radius>\n"
 	    "\tv=<min-velocity>-<max-velocity>\n"
 	    "\tdelta=<frame-delta-time>\n"
-	    "\tclear=<clear-alpha>\n"
+	    "\tclear=<clear-alpha>\n",
 	    progname);
 }