diff --git a/radio/src/pulses/pulses.h b/radio/src/pulses/pulses.h
index eba14a463..3b3fffca5 100644
--- a/radio/src/pulses/pulses.h
+++ b/radio/src/pulses/pulses.h
@@ -338,6 +338,7 @@ void extmodulePxx1SerialStart();
 void extmodulePpmStart();
 void intmoduleStop();
 void extmoduleStop();
+void extramodulePpmStart();
 
 inline void startPulses()
 {
diff --git a/radio/src/targets/sky9x/board.h b/radio/src/targets/sky9x/board.h
index 952e48282..4a8587194 100644
--- a/radio/src/targets/sky9x/board.h
+++ b/radio/src/targets/sky9x/board.h
@@ -410,4 +410,7 @@ bool telemetrySecondPortReceive(uint8_t & data);
 
 extern const uint8_t BootCode[];
 
+// Pulses driver
+#define HARDWARE_EXTRA_MODULE
+
 #endif // _BOARD_SKY9X_H_