diff --git a/usr.bin/find/find.1 b/usr.bin/find/find.1
index 23b06252fbfb..9c8cb088d7dd 100644
--- a/usr.bin/find/find.1
+++ b/usr.bin/find/find.1
@@ -146,7 +146,7 @@ was executed.
 True if the file is contained in a file system of type
 .Ar type .
 Currently supported types are ``local'', ``mfs'', ``nfs'', ``msdos'', ``isofs'',
-``rdonly'' and ``ufs''.
+``fdesc'', ``kernfs'', ``rdonly'' and ``ufs''.
 The types ``local'' and ``rdonly'' are not specific file system types.
 The former matches any file system physically mounted on the system where
 the
diff --git a/usr.bin/find/function.c b/usr.bin/find/function.c
index 08cd151424b1..e3a6c7b4638e 100644
--- a/usr.bin/find/function.c
+++ b/usr.bin/find/function.c
@@ -369,12 +369,32 @@ c_fstype(arg)
     
 	new = palloc(N_FSTYPE, f_fstype);
 	switch(*arg) {
+	case 'f':
+		if (!strcmp(arg, "fdesc")) {
+#ifdef MOUNT_FDESC
+			new->flags = MOUNT_FDESC;
+			return(new);
+#else
+			err("unknown file type %s", arg);
+#endif
+		}
+		break;
 	case 'i':
 		if (!strcmp(arg, "isofs")) {
 			new->flags = MOUNT_ISOFS;
 			return(new);
 		}
 		break;
+	case 'k':
+		if (!strcmp(arg, "kernfs")) {
+#ifdef MOUNT_KERNFS
+			new->flags = MOUNT_KERNFS;
+			return(new);
+#else
+			err("unknown file type %s", arg);
+#endif
+		}
+		break;
 	case 'l':
 		if (!strcmp(arg, "local")) {
 			new->flags = MOUNT_NONE;