diff --git a/radio/src/pulses/afhds2.cpp b/radio/src/pulses/afhds2.cpp
index a7ecd8029..f71dcd4a0 100644
--- a/radio/src/pulses/afhds2.cpp
+++ b/radio/src/pulses/afhds2.cpp
@@ -95,4 +95,5 @@ const etx_proto_driver_t Afhds2InternalDriver = {
   .processData = afhds2ProcessData,
   .processFrame = nullptr,
   .onConfigChange = nullptr,
+  .txCompleted = modulePortSerialTxCompleted,
 };
diff --git a/radio/src/pulses/pulses.cpp b/radio/src/pulses/pulses.cpp
index b04528670..b7696a19d 100644
--- a/radio/src/pulses/pulses.cpp
+++ b/radio/src/pulses/pulses.cpp
@@ -565,7 +565,7 @@ void pulsesSendNextFrame(uint8_t module)
     }
 
     // if previous frame not completed, skip this one
-    if (!drv->txCompleted(ctx)) return;
+    if (drv->txCompleted && !drv->txCompleted(ctx)) return;
 
     uint8_t channelStart = g_model.moduleData[module].channelsStart;
     int16_t* channels = &channelOutputs[channelStart];