diff --git a/src/src/hal/hal_stm32.cpp b/src/src/hal/hal_stm32.cpp
index 66ff57b450..9c6be46d4c 100644
--- a/src/src/hal/hal_stm32.cpp
+++ b/src/src/hal/hal_stm32.cpp
@@ -1,5 +1,6 @@
 
 #if defined(PLATFORM_STM32)
+#if !defined(TARGET_TX_FLYSKY_FRM301)
 
 #include <stm32_def.h>
 #include <string.h>
@@ -39,4 +40,5 @@ void __attribute__((used)) initVariant(void)
     /* This can be used to run some init before \ref setup() */
 }
 
+#endif
 #endif // PLATFORM_STM32
diff --git a/src/targets/flysky.ini b/src/targets/flysky.ini
index 125be252a2..5b734421ab 100644
--- a/src/targets/flysky.ini
+++ b/src/targets/flysky.ini
@@ -17,7 +17,7 @@ build_flags =
 	#-D SERIAL_UART_INSTANCE=2 # Remap default Serial to USART2
 	#-D PIN_SERIAL_RX=PA3
 	#-D PIN_SERIAL_TX=PA2
-src_filter = ${env_common_stm32.src_filter} -<rx_*.cpp>
+build_src_filter = ${env_common_stm32.build_src_filter} -<rx_*.cpp>
 #upload_flags =
 #	BOOTLOADER=bootloader/frm301_bootloader.bin
 #	VECT_OFFSET=0x1000
@@ -25,4 +25,4 @@ src_filter = ${env_common_stm32.src_filter} -<rx_*.cpp>
 
 # ********************************
 # Receiver targets
-# ********************************
\ No newline at end of file
+# ********************************
diff --git a/src/variants/FRM301/variant.cpp b/src/variants/FRM301/variant_FRM301.cpp
similarity index 100%
rename from src/variants/FRM301/variant.cpp
rename to src/variants/FRM301/variant_FRM301.cpp
diff --git a/src/variants/FRM301/variant.h b/src/variants/FRM301/variant_FRM301.h
similarity index 100%
rename from src/variants/FRM301/variant.h
rename to src/variants/FRM301/variant_FRM301.h