diff --git a/sys/dev/ipmi/ipmi.c b/sys/dev/ipmi/ipmi.c
--- a/sys/dev/ipmi/ipmi.c
+++ b/sys/dev/ipmi/ipmi.c
@@ -413,11 +413,16 @@
 			recv->msg.netfn =
 			    IPMI_REPLY_ADDR(kreq->ir_ipmb_addr) >> 2;
 			recv->msg.cmd = kreq->ir_ipmb_command;
-			/* Get the compcode of response */
-			kreq->ir_compcode = kreq->ir_reply[6];
-			/* Move the reply head past response header */
-			kreq->ir_reply += 7;
-			len = kreq->ir_replylen - 7;
+			if (kreq->ir_compcode == IPMI_GET_MSG_DATA_NA) {
+				/* No response data */
+				len = 1;
+			} else {
+				/* Get the compcode of response */
+				kreq->ir_compcode = kreq->ir_reply[6];
+				/* Move the reply head past response header */
+				kreq->ir_reply += 7;
+				len = kreq->ir_replylen - 7;
+			}
 		} else {
 			addr.channel = IPMI_BMC_CHANNEL;
 			recv->msg.netfn = IPMI_REPLY_ADDR(kreq->ir_addr) >> 2;
diff --git a/sys/sys/ipmi.h b/sys/sys/ipmi.h
--- a/sys/sys/ipmi.h
+++ b/sys/sys/ipmi.h
@@ -85,6 +85,7 @@
 # define IPMI_MSG_BUFFER_FULL		0x02
 # define IPMI_WDT_PRE_TIMEOUT		0x08
 #define IPMI_GET_MSG			0x33
+# define IPMI_GET_MSG_DATA_NA		0x80
 #define IPMI_SEND_MSG			0x34
 #define IPMI_GET_CHANNEL_INFO		0x42
 #define IPMI_RESET_WDOG			0x22