diff --git a/usr.sbin/fifolog/lib/fifolog_create.c b/usr.sbin/fifolog/lib/fifolog_create.c
index 17f38c96c3b..a1822100f74 100644
--- a/usr.sbin/fifolog/lib/fifolog_create.c
+++ b/usr.sbin/fifolog/lib/fifolog_create.c
@@ -45,6 +45,7 @@ fifolog_create(const char *fn, off_t size, ssize_t recsize)
 {
 	int i, fd;
 	ssize_t u;
+	u_int uu;
 	off_t ms;
 	struct stat st;
 	char *buf;
@@ -79,7 +80,8 @@ fifolog_create(const char *fn, off_t size, ssize_t recsize)
 	}
 
 	/* For raw disk with larger sectors: use 1 sector */
-	i = ioctl(fd, DIOCGSECTORSIZE, &u);
+	i = ioctl(fd, DIOCGSECTORSIZE, &uu);
+	u = uu;
 	if (i == 0 && (u > recsize || (recsize % u) != 0))
 		recsize = u;