diff --git a/src/msp_displayport.c b/src/msp_displayport.c
index a343ffa..59828a3 100644
--- a/src/msp_displayport.c
+++ b/src/msp_displayport.c
@@ -1055,6 +1055,11 @@ void parse_vtx_params(uint8_t isMSP_V2) {
         return;
     }
 
+    // Ignore unknown/unsupported VTX devices
+    if (msp_rx_buf[0] == VTXDEV_UNKNOWN || msp_rx_buf[0] == VTXDEV_UNSUPPORTED) {
+        return;
+    }
+
     fc_pwr_rx = msp_rx_buf[3];
     if (fc_pwr_rx == 0) {
         fc_pwr_rx = POWER_MAX+2; // 0mW
diff --git a/src/msp_displayport.h b/src/msp_displayport.h
index b9516e4..2d49603 100644
--- a/src/msp_displayport.h
+++ b/src/msp_displayport.h
@@ -112,6 +112,16 @@ typedef enum {
     VTX_MENU_SAVE_EXIT,
 } vtx_menu_state_e;
 
+typedef enum {
+    VTXDEV_UNSUPPORTED = 0, // reserved for MSP
+    VTXDEV_RTC6705     = 1,
+    // 2 reserved
+    VTXDEV_SMARTAUDIO  = 3,
+    VTXDEV_TRAMP       = 4,
+    VTXDEV_MSP         = 5,
+    VTXDEV_UNKNOWN     = 0xFF,
+} vtxDevType_e;
+
 typedef enum {
     DISPLAY_OSD,
     DISPLAY_CMS,