diff --git a/server/drivers/CFontz633.c b/server/drivers/CFontz633.c
index 4f14289..f4c012b 100644
--- a/server/drivers/CFontz633.c
+++ b/server/drivers/CFontz633.c
@@ -39,7 +39,7 @@
  *
  * THINGS TO DO:
  * + Make the caching at least for heartbeat icon
- * + Create and use the library (for custom char handeling)
+ * + Create and use the library (for custom char handling)
  *
  */
 
diff --git a/server/drivers/CFontzPacket.c b/server/drivers/CFontzPacket.c
index 97c129c..a4b9e80 100644
--- a/server/drivers/CFontzPacket.c
+++ b/server/drivers/CFontzPacket.c
@@ -613,8 +613,8 @@ CFontz633_set_contrast (Driver *drvthis, int promille)
 
 	// on CF633: 0 - 50, on CF631, CF635: 0 - 255
 	hardware_contrast = (p->model == 633)
-			    ? ((p->contrast * 255) / 1000)
-			    : (p->contrast / 20);
+			    ? (p->contrast / 20)
+			    : ((p->contrast * 255) / 1000);
 	/* Next line is to be checked $$$ */
 	send_onebyte_message(p->fd, CF633_Set_LCD_Contrast, hardware_contrast);
 }