diff --git a/lib/libspl/os/linux/zone.c b/lib/libspl/os/linux/zone.c
index 622d04cbc14a..f8a10bfa167a 100644
--- a/lib/libspl/os/linux/zone.c
+++ b/lib/libspl/os/linux/zone.c
@@ -1,62 +1,62 @@
 /*
  * CDDL HEADER START
  *
  * The contents of this file are subject to the terms of the
  * Common Development and Distribution License (the "License").
  * You may not use this file except in compliance with the License.
  *
  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  * or https://opensource.org/licenses/CDDL-1.0.
  * See the License for the specific language governing permissions
  * and limitations under the License.
  *
  * When distributing Covered Code, include this CDDL HEADER in each
  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  * If applicable, add the following below this CDDL HEADER, with the
  * fields enclosed by brackets "[]" replaced with your own identifying
  * information: Portions Copyright [yyyy] [name of copyright owner]
  *
  * CDDL HEADER END
  */
 /*
  * Copyright 2006 Ricardo Correia.  All rights reserved.
  * Use is subject to license terms.
  */
 
 #include <unistd.h>
 #include <stdio.h>
 #include <errno.h>
 #include <stdlib.h>
 #include <limits.h>
 #include <string.h>
 
 #include <zone.h>
 
 zoneid_t
 getzoneid(void)
 {
 	char path[PATH_MAX];
 	char buf[128] = { '\0' };
 	char *cp;
 
 	int c = snprintf(path, sizeof (path), "/proc/self/ns/user");
 	/* This API doesn't have any error checking... */
 	if (c < 0 || c >= sizeof (path))
-		return (0);
+		return (GLOBAL_ZONEID);
 
 	ssize_t r = readlink(path, buf, sizeof (buf) - 1);
 	if (r < 0)
-		return (0);
+		return (GLOBAL_ZONEID);
 
 	cp = strchr(buf, '[');
 	if (cp == NULL)
-		return (0);
+		return (GLOBAL_ZONEID);
 	cp++;
 
 	unsigned long n = strtoul(cp, NULL, 10);
 	if (n == ULONG_MAX && errno == ERANGE)
-		return (0);
+		return (GLOBAL_ZONEID);
 	zoneid_t z = (zoneid_t)n;
 
 	return (z);
 }