diff --git a/radio/src/Makefile b/radio/src/Makefile
index dde8ed6f3..6c5db764e 100644
--- a/radio/src/Makefile
+++ b/radio/src/Makefile
@@ -1078,7 +1078,7 @@ MSG_CLEANING = Cleaning project:
 # Combine all necessary flags and optional flags.
 # Add target processor to flags.
 
-ARMCPPFLAGS = -c -mcpu=$(MCU) -mthumb -fomit-frame-pointer -fverbose-asm -Wa,-ahlms=opentx.lst -DRUN_FROM_FLASH=1 -O$(OPT) $(CPPFLAGS) $(INCFLAGS) $(EXTRAINCFLAGS) $(GENDEPFLAGS)
+ARMCPPFLAGS = -c -mcpu=$(MCU) -mthumb -fomit-frame-pointer -fverbose-asm -Wa,-ahlms=opentx.lst -DRUN_FROM_FLASH=1 -O$(OPT) $(CPPFLAGS) -fdata-sections -ffunction-sections $(INCFLAGS) $(EXTRAINCFLAGS) $(GENDEPFLAGS) 
 AVRCPPFLAGS = -mmcu=$(MCU) -I. -x c++ -O$(OPT) $(CPPFLAGS) $(INCFLAGS) $(EXTRAINCFLAGS) $(GENDEPFLAGS) -fwhole-program
 
 ifeq ($(ARCH), AVR)
@@ -1349,7 +1349,7 @@ OBJS =  $(TMP:.s=.o)
 	@echo
 	@echo $(MSG_COMPILING) $@
 	$(CC) $(ARMCPPFLAGS) $< -o allsrc.o
-	$(CC) $(OBJS) allsrc.o -mcpu=cortex-m3 -mthumb -nostartfiles -lm -T$(LDSCRIPT) -Wl,-Map=$(TARGET).map,--cref,--no-warn-mismatch -o $@
+	$(CC) $(OBJS) allsrc.o -mcpu=cortex-m3 -mthumb -nostartfiles -lm -T$(LDSCRIPT) -Wl,-Map=$(TARGET).map,--cref,--no-warn-mismatch,--gc-sections -o $@
 endif
 
 # Target: clean project.