diff --git a/drivers/video/tridentfb.c b/drivers/video/tridentfb.c
index 5976a1e..0a4e07d 100644
--- a/drivers/video/tridentfb.c
+++ b/drivers/video/tridentfb.c
@@ -745,7 +745,7 @@
 			switch (tmp) {
 
 			case 0x01:
-				k = 512;
+				k = 512 * Kb;
 				break;
 			case 0x02:
 				k = 6 * Mb;	/* XP */