diff --git a/radio/src/pulses/pulses.cpp b/radio/src/pulses/pulses.cpp
index c63da93aa..c0679b01b 100755
--- a/radio/src/pulses/pulses.cpp
+++ b/radio/src/pulses/pulses.cpp
@@ -239,7 +239,7 @@ void enablePulses(uint8_t module, uint8_t protocol)
 void setupPulsesInternalModule(uint8_t protocol)
 {
   switch (protocol) {
-#if defined(PXX1) && !defined(INTMODULE_USART)
+#if defined(HARDWARE_INTERNAL_MODULE) && defined(PXX1) && !defined(INTMODULE_USART)
     case PROTOCOL_CHANNELS_PXX1_PULSES:
       intmodulePulsesData.pxx.setupFrame(INTERNAL_MODULE);
       scheduleNextMixerCalculation(INTERNAL_MODULE, INTMODULE_PXX_PERIOD);
diff --git a/radio/src/targets/sky9x/board.h b/radio/src/targets/sky9x/board.h
index b5f227421..a37321b1a 100644
--- a/radio/src/targets/sky9x/board.h
+++ b/radio/src/targets/sky9x/board.h
@@ -257,7 +257,7 @@ void init_no_pulses(uint32_t port);
 void disable_no_pulses(uint32_t port);
 void init_ppm(uint32_t port);
 void disable_ppm(uint32_t port);
-void init_pxx(uint32_t port);
+void init_pxx1_pulses(uint32_t port);
 void disable_pxx1_pulses(uint32_t port);
 void init_serial(uint32_t port, uint32_t baudrate, uint32_t period_half_us);
 void disable_serial(uint32_t port);
diff --git a/radio/src/targets/sky9x/pulses_driver.cpp b/radio/src/targets/sky9x/pulses_driver.cpp
index 326a7fd16..4058bedd4 100644
--- a/radio/src/targets/sky9x/pulses_driver.cpp
+++ b/radio/src/targets/sky9x/pulses_driver.cpp
@@ -214,7 +214,7 @@ void disable_ssc()
   sscptr->SSC_CR = SSC_CR_TXDIS;
 }
 
-void init_pxx(uint32_t port)
+void init_pxx1_pulses(uint32_t port)
 {
   if (port == EXTERNAL_MODULE) {
     init_main_ppm(2500 * 2, 0);