Index: head/sys/dev/hyperv/utilities/hv_heartbeat.c
===================================================================
--- head/sys/dev/hyperv/utilities/hv_heartbeat.c
+++ head/sys/dev/hyperv/utilities/hv_heartbeat.c
@@ -75,8 +75,7 @@
 		&buf[sizeof(struct hv_vmbus_pipe_hdr)];
 
 	    if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) {
-		hv_negotiate_version(icmsghdrp, NULL, buf);
-
+		hv_negotiate_version(icmsghdrp, buf);
 	    } else {
 		heartbeat_msg =
 		    (struct hv_vmbus_heartbeat_msg_data *)
Index: head/sys/dev/hyperv/utilities/hv_shutdown.c
===================================================================
--- head/sys/dev/hyperv/utilities/hv_shutdown.c
+++ head/sys/dev/hyperv/utilities/hv_shutdown.c
@@ -79,8 +79,7 @@
 		&buf[sizeof(struct hv_vmbus_pipe_hdr)];
 
 	    if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) {
-		hv_negotiate_version(icmsghdrp, NULL, buf);
-
+		hv_negotiate_version(icmsghdrp, buf);
 	    } else {
 		shutdown_msg =
 		    (struct hv_vmbus_shutdown_msg_data *)
Index: head/sys/dev/hyperv/utilities/hv_timesync.c
===================================================================
--- head/sys/dev/hyperv/utilities/hv_timesync.c
+++ head/sys/dev/hyperv/utilities/hv_timesync.c
@@ -155,7 +155,7 @@
 		sizeof(struct hv_vmbus_pipe_hdr)];
 
 	    if (icmsghdrp->icmsgtype == HV_ICMSGTYPE_NEGOTIATE) {
-		hv_negotiate_version(icmsghdrp, NULL, time_buf);
+		hv_negotiate_version(icmsghdrp, time_buf);
 	    } else {
 		timedatap = (struct hv_ictimesync_data *) &time_buf[
 		    sizeof(struct hv_vmbus_pipe_hdr) +
Index: head/sys/dev/hyperv/utilities/hv_util.h
===================================================================
--- head/sys/dev/hyperv/utilities/hv_util.h
+++ head/sys/dev/hyperv/utilities/hv_util.h
@@ -43,11 +43,9 @@
 	uint8_t			*receive_buffer;
 } hv_util_sc;
 
-void hv_negotiate_version(
-	struct hv_vmbus_icmsg_hdr*		icmsghdrp,
-	struct hv_vmbus_icmsg_negotiate*	negop,
-	uint8_t*				buf);
+void hv_negotiate_version(struct hv_vmbus_icmsg_hdr *icmsghdrp, uint8_t *buf);
 
 int hv_util_attach(device_t dev);
 int hv_util_detach(device_t dev);
+
 #endif
Index: head/sys/dev/hyperv/utilities/hv_util.c
===================================================================
--- head/sys/dev/hyperv/utilities/hv_util.c
+++ head/sys/dev/hyperv/utilities/hv_util.c
@@ -45,11 +45,10 @@
 #include "hv_util.h"
 
 void
-hv_negotiate_version(
-	struct hv_vmbus_icmsg_hdr*		icmsghdrp,
-	struct hv_vmbus_icmsg_negotiate*	negop,
-	uint8_t*				buf)
+hv_negotiate_version(struct hv_vmbus_icmsg_hdr *icmsghdrp, uint8_t *buf)
 {
+	struct hv_vmbus_icmsg_negotiate *negop;
+
 	icmsghdrp->icmsgsize = 0x10;
 
 	negop = (struct hv_vmbus_icmsg_negotiate *)&buf[