diff --git a/include/ipmitool/ipmi_mc.h b/include/ipmitool/ipmi_mc.h
index 78ceb3d..65cba84 100644
--- a/include/ipmitool/ipmi_mc.h
+++ b/include/ipmitool/ipmi_mc.h
@@ -83,7 +83,7 @@ struct ipm_devid_rsp {
 #define IPM_DEV_DEVICE_ID_REV_MASK     (0x0F)	/* BCD-enoded             */
 
 #define IPM_DEV_FWREV1_AVAIL_MASK      (0x80)	/* 0 = normal operation   */
-#define IPM_DEV_FWREV1_MAJOR_MASK      (0x3f)	/* Major rev, BCD-encoded */
+#define IPM_DEV_FWREV1_MAJOR_MASK      (0x7f)	/* Major rev, BCD-encoded */
 
 #define IPM_DEV_IPMI_VER_MAJOR_MASK    (0x0F)	/* Major rev, BCD-encoded */
 #define IPM_DEV_IPMI_VER_MINOR_MASK    (0xF0)	/* Minor rev, BCD-encoded */