--- a/sys/src/9/pc/sdide.c
+++ b/sys/src/9/pc/sdide.c
@@ -2062,6 +2062,7 @@
 		case (0x5288<<16)|0x10B9:	/* ALi M5288 SATA */
 			/*FALLTHROUGH*/
 		case (0x5513<<16)|0x1039:	/* SiS 962 */
+                case (0x0180<<16)|0x1039:       /* SiS 964 */
 		case (0x0646<<16)|0x1095:	/* CMD 646 */
 		case (0x0571<<16)|0x1106:	/* VIA 82C686 */
 		case (0x9001<<16)|0x1106:	/* VIA chipset in VIA PV530 */