diff --git a/targets/tyan/s2891/Config.lb b/targets/tyan/s2891/Config.lb
index 8b4e0b01a7..fe91c36f7f 100644
--- a/targets/tyan/s2891/Config.lb
+++ b/targets/tyan/s2891/Config.lb
@@ -7,12 +7,12 @@ mainboard tyan/s2891
 
 # Tyan s2891
 romimage "normal"
-#       48K for ATI ROM in 1M
-	option ROM_SIZE = 1024*1024-48*1024
-#       48K for SCSI FW or ATI ROM
+#       36K for ATI ROM in 1M
+	option ROM_SIZE = 1024*1024-36*1024
+#       48K for SCSI FW
 #        option ROM_SIZE = 512*1024-48*1024
-#       48K for SCSI FW and 48K for ATI ROM
-#       option ROM_SIZE = 512*1024-48*1024-48*1024
+#       48K for SCSI FW and 36K for ATI ROM
+#       option ROM_SIZE = 512*1024-48*1024-36*1024
 #       64K for Etherboot
 #        option ROM_SIZE = 512*1024-64*1024
 	option USE_FALLBACK_IMAGE=0