diff --git a/src/main/rx/crsf.c b/src/main/rx/crsf.c
index e06c6dc8d1..1c598ca537 100644
--- a/src/main/rx/crsf.c
+++ b/src/main/rx/crsf.c
@@ -233,7 +233,7 @@ void crsfRxSendTelemetryData(void)
     if (telemetryBufLen > 0) {
         // check that we are not in bi dir mode or that we are not currently receiving data (ie in the middle of an RX frame)
         // and that there is time to send the telemetry frame before the next RX frame arrives
-        if (CRSF_PORT_OPTIONS & SERIAL_BIDIR) {
+        if (rxConfig()->halfDuplex) {
             const uint32_t timeSinceStartOfFrame = micros() - crsfFrameStartAt;
             if ((timeSinceStartOfFrame < CRSF_TIME_NEEDED_PER_FRAME_US) ||
                 (timeSinceStartOfFrame > CRSF_TIME_BETWEEN_FRAMES_US - CRSF_TIME_NEEDED_PER_FRAME_US)) {
diff --git a/src/test/unit/rx_crsf_unittest.cc b/src/test/unit/rx_crsf_unittest.cc
index 09fa725b5f..0b41b35325 100644
--- a/src/test/unit/rx_crsf_unittest.cc
+++ b/src/test/unit/rx_crsf_unittest.cc
@@ -26,6 +26,8 @@ extern "C" {
 
     #include "build/debug.h"
 
+    #include "config/parameter_group.h"
+    #include "config/parameter_group_ids.h"
     #include "common/crc.h"
     #include "common/utils.h"
 
@@ -47,6 +49,8 @@ extern "C" {
     extern uint32_t crsfChannelData[CRSF_MAX_CHANNEL];
 
     uint32_t dummyTimeUs;
+
+    PG_REGISTER(rxConfig_t, rxConfig, PG_RX_CONFIG, 0);
 }
 
 #include "unittest_macros.h"
diff --git a/src/test/unit/telemetry_crsf_msp_unittest.cc b/src/test/unit/telemetry_crsf_msp_unittest.cc
index 8ef8099531..2913bc6867 100644
--- a/src/test/unit/telemetry_crsf_msp_unittest.cc
+++ b/src/test/unit/telemetry_crsf_msp_unittest.cc
@@ -77,6 +77,7 @@ extern "C" {
     PG_REGISTER(batteryConfig_t, batteryConfig, PG_BATTERY_CONFIG, 0);
     PG_REGISTER(telemetryConfig_t, telemetryConfig, PG_TELEMETRY_CONFIG, 0);
     PG_REGISTER(systemConfig_t, systemConfig, PG_SYSTEM_CONFIG, 0);
+    PG_REGISTER(rxConfig_t, rxConfig, PG_RX_CONFIG, 0);
 
     extern bool crsfFrameDone;
     extern crsfFrame_t crsfFrame;
diff --git a/src/test/unit/telemetry_crsf_unittest.cc b/src/test/unit/telemetry_crsf_unittest.cc
index 2744947275..50f84bf393 100644
--- a/src/test/unit/telemetry_crsf_unittest.cc
+++ b/src/test/unit/telemetry_crsf_unittest.cc
@@ -49,6 +49,7 @@ extern "C" {
     #include "io/gps.h"
     #include "io/serial.h"
 
+    #include "rx/rx.h"
     #include "rx/crsf.h"
 
     #include "sensors/battery.h"
@@ -68,6 +69,7 @@ extern "C" {
     PG_REGISTER(batteryConfig_t, batteryConfig, PG_BATTERY_CONFIG, 0);
     PG_REGISTER(telemetryConfig_t, telemetryConfig, PG_TELEMETRY_CONFIG, 0);
     PG_REGISTER(systemConfig_t, systemConfig, PG_SYSTEM_CONFIG, 0);
+    PG_REGISTER(rxConfig_t, rxConfig, PG_RX_CONFIG, 0);
 }
 
 #include "unittest_macros.h"