diff --git a/sys/fs/tmpfs/tmpfs_subr.c b/sys/fs/tmpfs/tmpfs_subr.c
index a0d0d0a06ecf..3ceaa2d066f9 100644
--- a/sys/fs/tmpfs/tmpfs_subr.c
+++ b/sys/fs/tmpfs/tmpfs_subr.c
@@ -86,7 +86,7 @@ SYSCTL_INT(_vfs_tmpfs, OID_AUTO, domain_policy, CTLFLAG_RDTUN,
 static int vm_domain_target = 0;
 SYSCTL_INT(_vfs_tmpfs, OID_AUTO, domain_target, CTLFLAG_RDTUN, 
 			&vm_domain_target, 0, "target domain for the policy. only appicable to FIXED and PREF.");
-static domainset * vm_domainset = NULL;
+static struct domainset * vm_domainset = NULL;
 
 static long tmpfs_pages_reserved = TMPFS_PAGES_MINRESERVED;