Index: uspace/srv/hid/output/proto/vt100.c
===================================================================
--- uspace/srv/hid/output/proto/vt100.c	(revision 1543d4c8f0b837462c81435cd51f0aed2abf865b)
+++ uspace/srv/hid/output/proto/vt100.c	(revision 1502c055a8eeb72861c4fa35a13e69ffe8586b7a)
@@ -41,5 +41,14 @@
 #include "vt100.h"
 
-#define MAX_CONTROL  20
+/** Buffer size when creating actual VT100 commands.
+ *
+ * This is absurdly large but since we accept numbers via sysarg_t,
+ * we make it big enough for the largest value to be on the safe side
+ * (and to silence compiler too).
+ *
+ * TODO: find out if VT100 has some hard limits or perhaps simply cut-out
+ * values larger than 16 bits or something.
+ */
+#define MAX_CONTROL 64
 
 typedef enum {