diff --git a/sbin/mount/mount.c b/sbin/mount/mount.c
index 8c68467465c1..debe3547a8ff 100644
--- a/sbin/mount/mount.c
+++ b/sbin/mount/mount.c
@@ -541,7 +541,7 @@ append_arg(struct cpa *sa, char *arg)
 {
 	if (sa->c + 1 == sa->sz) {
 		sa->sz = sa->sz == 0 ? 8 : sa->sz * 2;
-		sa->a = realloc(sa->a, sizeof(sa->a) * sa->sz);
+		sa->a = realloc(sa->a, sizeof(*sa->a) * sa->sz);
 		if (sa->a == NULL)
 			errx(1, "realloc failed");
 	}
diff --git a/sbin/umount/umount.c b/sbin/umount/umount.c
index 521bbc890b64..6cd8ea76349c 100644
--- a/sbin/umount/umount.c
+++ b/sbin/umount/umount.c
@@ -434,7 +434,7 @@ getmntentry(const char *fromname, const char *onname, fsid_t *fsid, dowhat what)
 {
 	static struct statfs *mntbuf;
 	static size_t mntsize = 0;
-	static char *mntcheck = NULL;
+	static int *mntcheck = NULL;
 	struct statfs *sfs, *foundsfs;
 	int i, count;