diff --git a/companion/src/firmwares/opentx/opentxinterface.cpp b/companion/src/firmwares/opentx/opentxinterface.cpp
index f3558a245..b92aeb98a 100644
--- a/companion/src/firmwares/opentx/opentxinterface.cpp
+++ b/companion/src/firmwares/opentx/opentxinterface.cpp
@@ -774,9 +774,8 @@ bool OpenTxFirmware::isAvailable(PulsesProtocol proto, int port)
           case PULSES_PPM:
             return id.contains("internalppm");
           case PULSES_ACCESS_ISRM:
-            return IS_TARANIS_XLITES(board) || IS_TARANIS_X9LITE(board) || board == BOARD_TARANIS_X9DP_2019 || board == BOARD_X10_EXPRESS || (IS_HORUS(board) && id.contains("internalaccess"));
           case PULSES_ACCST_ISRM_D16:
-            return (IS_TARANIS_XLITES(board) || IS_TARANIS_X9LITE(board));
+            return IS_TARANIS_XLITES(board) || IS_TARANIS_X9LITE(board) || board == BOARD_TARANIS_X9DP_2019 || board == BOARD_X10_EXPRESS || (IS_HORUS(board) && id.contains("internalaccess"));
           default:
             return false;
         }