diff --git a/server/driver.c b/server/driver.c
index b5da826..da76a8f 100644
--- a/server/driver.c
+++ b/server/driver.c
@@ -382,57 +382,62 @@ driver_alt_num( Driver * drv, int x, int num )
 {
 	/* Ugly code extracted by David GLAUDE from lcdm001.c ;)*/
 	/* Moved to driver.c by Joris Robijn */
-	static char num_map [10][4][3] = {
-	{
-		{' ','_',' '}, /*0*/
-		{'|',' ','|'},
-		{'|','_','|'},
-		{' ',' ',' '}},
-	{
-		{' ',' ',' '},/*1*/
-		{' ',' ','|'},
-		{' ',' ','|'},
-		{' ',' ',' '}},
-	{
-		{' ','_',' '},/*2*/
-		{' ','_','|'},
-		{'|','_',' '},
-		{' ',' ',' '}},
-	{
-		{' ','_',' '},/*3*/
-		{' ','_','|'},
-		{' ','_','|'},
-		{' ',' ',' '}},
-	{
-		{' ',' ',' '},/*4*/
-		{'|','_','|'},
-		{' ',' ','|'},
-		{' ',' ',' '}},
-	{
-		{' ','_',' '},/*5*/
-		{'|','_',' '},
-		{' ','_','|'},
-		{' ',' ',' '}},
-	{
-		{' ','_',' '},/*6*/
-		{'|','_',' '},
-		{'|','_','|'},
-		{' ',' ',' '}},
-	{
-		{' ','_',' '},/*7*/
-		{' ',' ','|'},
-		{' ',' ','|'},
-		{' ',' ',' '}},
-	{
-		{' ','_',' '},/*8*/
-		{'|','_','|'},
-		{'|','_','|'},
-		{' ',' ',' '}},
-	{
-		{' ','_',' '},/*9*/
-		{'|','_','|'},
-		{' ','_','|'},
-		{' ',' ',' '}}
+	static char num_map[][4][4] = {
+	{ /* 0 */
+		" _ ",
+		"| |",
+		"|_|",
+		"   " },
+	{ /* 1 */
+		"   ",
+		"  |",
+		"  |",
+		"   " },
+	{ /* 2 */
+		" _ ",
+		" _|",
+		"|_ ",
+		"   " },
+	{ /* 3 */
+		" _ ",
+		" _|",
+		" _|",
+		"   " },
+	{ /* 4 */
+		"   ",
+		"|_|",
+		"  |",
+		"   " },
+	{ /* 5 */
+		" _ ",
+		"|_ ",
+		" _|",
+		"   " },
+	{ /* 6 */
+		" _ ",
+		"|_ ",
+		"|_|",
+		"   " },
+	{ /* 7 */
+		" _ ",
+		"  |",
+		"  |",
+		"   " },
+	{ /* 8 */
+		" _ ",
+		"|_|",
+		"|_|",
+		"   " },
+	{ /* 9 */
+		" _ ",
+		"|_|",
+		" _|",
+		"   " },
+	{ /* colon */
+		" ",
+		".",
+		".",
+		" " }
 	};
 	/* End of ugly code ;) by Rene Wagner */
 	/* I like this code !  Joris */
@@ -441,12 +446,14 @@ driver_alt_num( Driver * drv, int x, int num )
 
 	debug (RPT_DEBUG, "%s( drv=[%.40s], x=%d, num=%d )", __FUNCTION__, drv->name, x, num);
 
+	if ((num < 0) || (num > 10))
+		return;
 	if (!drv->chr)
 		return;
 
-	for (y = 1; y < 5; y++)
-		for (dx = 0; dx < 3; dx++)
-			drv->chr (drv, x + dx, y, num_map[num][y-1][dx]);
+	for (y = 0; y < 4; y++)
+		for (dx = 0; num_map[num][y][dx] != '\0'; dx++)
+			drv->chr (drv, x + dx, y+1, num_map[num][y][dx]);
 }
 
 void