diff --git a/radio/src/targets/common/arm/stm32/intmodule_serial_driver.cpp b/radio/src/targets/common/arm/stm32/intmodule_serial_driver.cpp
index 5b5c5a3b2..bb0290aed 100755
--- a/radio/src/targets/common/arm/stm32/intmodule_serial_driver.cpp
+++ b/radio/src/targets/common/arm/stm32/intmodule_serial_driver.cpp
@@ -208,6 +208,7 @@ void intmoduleSendNextFrame()
 
 void intmoduleWaitForTxCompleted()
 {
+#if !defined(SIMU)
 #if defined(INTMODULE_DMA_STREAM)
   if (DMA_GetCmdStatus(INTMODULE_DMA_STREAM) == ENABLE) {
     while(DMA_GetFlagStatus(INTMODULE_DMA_STREAM, INTMODULE_DMA_FLAG_TC) == RESET);
@@ -216,4 +217,5 @@ void intmoduleWaitForTxCompleted()
 #else
   while (intmoduleTxBufferRemaining > 0);
 #endif
+#endif
 }