diff --git a/modem/Modem.h b/modem/Modem.h
index 18ab35d0..c087aa59 100644
--- a/modem/Modem.h
+++ b/modem/Modem.h
@@ -120,8 +120,6 @@ namespace modem
         CMD_P25_LOST = 0x32U,
         CMD_P25_CLEAR = 0x33U,
 
-        CMD_DFSI_DATA = 0x40U,
-
         CMD_ACK = 0x70U,
         CMD_NAK = 0x7FU,