diff --git a/usr.sbin/mountd/mountd.c b/usr.sbin/mountd/mountd.c
--- a/usr.sbin/mountd/mountd.c
+++ b/usr.sbin/mountd/mountd.c
@@ -290,7 +290,7 @@
 static int nhosts = 0;
 static int dir_only = 1;
 static int dolog = 0;
-static int got_sighup = 0;
+static _Atomic(int) got_sighup = 0;
 static int xcreated = 0;
 
 static char *svcport_str = NULL;