--- ../fusermount.c.orig	2018-10-13 19:06:31.957898402 +0200
+++ ./util/fusermount.c	2018-10-13 19:13:39.298247332 +0200
@@ -22,6 +22,7 @@
 #include <pwd.h>
 #include <paths.h>
 #include <mntent.h>
+#include <sys/file.h>
 #include <sys/wait.h>
 #include <sys/stat.h>
 #include <sys/mount.h>
@@ -114,7 +115,7 @@
 			progname, strerror(errno));
 		return -1;
 	}
-	res = lockf(mtablock, F_LOCK, 0);
+	res = flock(mtablock, F_LOCK);
 	if (res < 0) {
 		fprintf(stderr, "%s: error getting lock: %s\n", progname,
 			strerror(errno));
@@ -130,7 +131,7 @@
 	if (mtablock >= 0) {
 		int res;
 
-		res = lockf(mtablock, F_ULOCK, 0);
+		res = flock(mtablock, F_ULOCK);
 		if (res < 0) {
 			fprintf(stderr, "%s: error releasing lock: %s\n",
 				progname, strerror(errno));