diff --git a/sbin/fdisk/fdisk.c b/sbin/fdisk/fdisk.c
--- a/sbin/fdisk/fdisk.c
+++ b/sbin/fdisk/fdisk.c
@@ -265,6 +265,10 @@
 	int	partition = -1;
 	struct	dos_partition *partp;
 
+	fprintf(stderr,
+	    "WARNING: fdisk is deprecated and is not available in FreeBSD 15 or later.\n"
+	    "Please use gpart instead.\n\n");
+
 	while ((c = getopt(argc, argv, "BIab:f:ipqstuv1234")) != -1)
 		switch (c) {
 		case 'B':