1 files changed, 1 insertions, 1 deletions

diff --git a/fs/adfs/adfs.h b/fs/adfs/adfs.h
index a8a58d864f96..718ac1f440c6 100644
--- a/fs/adfs/adfs.h
+++ b/fs/adfs/adfs.h
@@ -112,7 +112,7 @@ struct object_info {
 /* RISC OS 12-bit filetype converts to ,xyz hex filename suffix */
 static inline int append_filetype_suffix(char *buf, __u16 filetype)
 {
-        if (filetype == -1)
+        if (filetype == 0xffff) /* no explicit 12-bit file type was set */
                 return 0;
 
         *buf++ = ',';