diff --git a/radio/src/opentx.cpp b/radio/src/opentx.cpp
index bc6dffd4c..70c01c98f 100644
--- a/radio/src/opentx.cpp
+++ b/radio/src/opentx.cpp
@@ -1839,6 +1839,7 @@ inline void playCustomFunctionFile(CustomFnData *sd, uint8_t id)
 
 void evalFunctions()
 {
+  TRACE("func");
   MASK_FUNC_TYPE newActiveFunctions  = 0;
   MASK_CFN_TYPE  newActiveFnSwitches = 0;
 
diff --git a/radio/src/switches.cpp b/radio/src/switches.cpp
index 64323b026..8943a21ab 100644
--- a/radio/src/switches.cpp
+++ b/radio/src/switches.cpp
@@ -472,6 +472,7 @@ bool getSwitch(int8_t swtch)
 */
 void evalLogicalSwitches(bool isCurrentPhase)
 {
+  TRACE("eval %d %d", mixerCurrentFlightMode, isCurrentPhase);
   for (unsigned int idx=0; idx<NUM_LOGICAL_SWITCH; idx++) {
     LogicalSwitchContext &context = lswFm[mixerCurrentFlightMode].lsw[idx];
     bool result = getLogicalSwitch(idx);