diff --git a/sys/cam/ctl/ctl.c b/sys/cam/ctl/ctl.c
--- a/sys/cam/ctl/ctl.c
+++ b/sys/cam/ctl/ctl.c
@@ -12837,7 +12837,7 @@
 		char path_str[64];
 		struct sbuf sb;
 
-		ctl_scsi_path_string(io, path_str, sizeof(path_str));
+		ctl_scsi_path_string(&io->io_hdr, path_str, sizeof(path_str));
 		sbuf_new(&sb, str, sizeof(str), SBUF_FIXEDLEN);
 
 		ctl_io_sbuf(io, &sb);
diff --git a/sys/cam/ctl/ctl_scsi_all.h b/sys/cam/ctl/ctl_scsi_all.h
--- a/sys/cam/ctl/ctl_scsi_all.h
+++ b/sys/cam/ctl/ctl_scsi_all.h
@@ -43,7 +43,7 @@
 int ctl_scsi_sense_sbuf(struct ctl_scsiio *ctsio,
 			struct scsi_inquiry_data *inq_data, struct sbuf *sb,
 			scsi_sense_string_flags flags);
-void ctl_scsi_path_string(union ctl_io *io, char *path_str, int strlen);
+void ctl_scsi_path_string(struct ctl_io_hdr *hdr, char *path_str, int strlen);
 char *ctl_scsi_sense_string(struct ctl_scsiio *ctsio,
 			    struct scsi_inquiry_data *inq_data, char *str,
 			    int str_len);
diff --git a/sys/cam/ctl/ctl_scsi_all.c b/sys/cam/ctl/ctl_scsi_all.c
--- a/sys/cam/ctl/ctl_scsi_all.c
+++ b/sys/cam/ctl/ctl_scsi_all.c
@@ -109,12 +109,12 @@
 }
 
 void
-ctl_scsi_path_string(union ctl_io *io, char *path_str, int len)
+ctl_scsi_path_string(struct ctl_io_hdr *hdr, char *path_str, int len)
 {
 
 	snprintf(path_str, len, "(%u:%u:%u/%u): ",
-	    io->io_hdr.nexus.initid, io->io_hdr.nexus.targ_port,
-	    io->io_hdr.nexus.targ_lun, io->io_hdr.nexus.targ_mapped_lun);
+	    hdr->nexus.initid, hdr->nexus.targ_port,
+	    hdr->nexus.targ_lun, hdr->nexus.targ_mapped_lun);
 }
 
 /*
@@ -130,7 +130,7 @@
 	if ((ctsio == NULL) || (sb == NULL))
 		return(-1);
 
-	ctl_scsi_path_string((union ctl_io *)ctsio, path_str, sizeof(path_str));
+	ctl_scsi_path_string(&ctsio->io_hdr, path_str, sizeof(path_str));
 
 	if (flags & SSS_FLAG_PRINT_COMMAND) {
 		sbuf_cat(sb, path_str);
diff --git a/sys/cam/ctl/ctl_util.c b/sys/cam/ctl/ctl_util.c
--- a/sys/cam/ctl/ctl_util.c
+++ b/sys/cam/ctl/ctl_util.c
@@ -731,7 +731,7 @@
 	const char *task_desc;
 	char path_str[64];
 
-	ctl_scsi_path_string(io, path_str, sizeof(path_str));
+	ctl_scsi_path_string(&io->io_hdr, path_str, sizeof(path_str));
 
 	switch (io->io_hdr.io_type) {
 	case CTL_IO_SCSI:
@@ -784,7 +784,7 @@
 		}
 	}
 
-	ctl_scsi_path_string(io, path_str, sizeof(path_str));
+	ctl_scsi_path_string(&io->io_hdr, path_str, sizeof(path_str));
 
 	sbuf_cat(sb, path_str);
 	if (status_desc == NULL)
@@ -861,7 +861,7 @@
 		return;
 	if (io->scsiio.kern_sg_entries > 0)	/* XXX: Implement */
 		return;
-	ctl_scsi_path_string(io, path_str, sizeof(path_str));
+	ctl_scsi_path_string(&io->io_hdr, path_str, sizeof(path_str));
 	len = min(io->scsiio.kern_data_len, 4096);
 	for (i = 0; i < len; ) {
 		sbuf_new(&sb, str, sizeof(str), SBUF_FIXEDLEN);
diff --git a/usr.sbin/ctladm/ctladm.c b/usr.sbin/ctladm/ctladm.c
--- a/usr.sbin/ctladm/ctladm.c
+++ b/usr.sbin/ctladm/ctladm.c
@@ -1245,7 +1245,7 @@
 		goto bailout;
 	}
 
-	ctl_scsi_path_string(io, scsi_path, sizeof(scsi_path));
+	ctl_scsi_path_string(&io->io_hdr, scsi_path, sizeof(scsi_path));
 	if ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS) {
 		fprintf(stdout, "%s LUN %s successfully\n", scsi_path,
 			(start) ?  "started" : "stopped");
@@ -1966,7 +1966,7 @@
 		retval = 1;
 		ctl_io_error_print(io, NULL, stderr);
 	} else if (path_str != NULL)
-		ctl_scsi_path_string(io, path_str, path_len);
+		ctl_scsi_path_string(&io->io_hdr, path_str, path_len);
 
 bailout:
 	ctl_scsi_free_io(io);
@@ -2364,7 +2364,7 @@
 	}
 	if ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS) {
 		char scsi_path[40];
-		ctl_scsi_path_string(io, scsi_path, sizeof(scsi_path));
+		ctl_scsi_path_string(&io->io_hdr, scsi_path, sizeof(scsi_path));
 		fprintf( stdout, "%sPERSISTENT RESERVE OUT executed "
 			"successfully\n", scsi_path);
 	} else