diff --git a/include/patty/ax25/frame.h b/include/patty/ax25/frame.h
index f4eae87..7a9ff66 100644
--- a/include/patty/ax25/frame.h
+++ b/include/patty/ax25/frame.h
@@ -56,7 +56,7 @@ enum patty_ax25_frame_type {
     PATTY_AX25_FRAME_UA      = 0x63,
     PATTY_AX25_FRAME_FRMR    = 0x87,
     PATTY_AX25_FRAME_UI      = 0x03,
-    PATTY_AX25_FRAME_XID     = 0x8f,
+    PATTY_AX25_FRAME_XID     = 0xaf,
     PATTY_AX25_FRAME_TEST    = 0xe3,
     PATTY_AX25_FRAME_UNKNOWN = 0xff
 };