diff --git a/conf/Makefile.stm32 b/conf/Makefile.stm32
index cd5176ad3b..a3b732c8c5 100644
--- a/conf/Makefile.stm32
+++ b/conf/Makefile.stm32
@@ -212,7 +212,7 @@ lss: $(OBJDIR)/$(TARGET).lss
 sym: $(OBJDIR)/$(TARGET).sym
 
 # Display size of file.
-ELFSIZE = $(SIZE) -A $(OBJDIR)/$(TARGET).elf
+ELFSIZE = $(SIZE) -A -x $(OBJDIR)/$(TARGET).elf
 sizebefore:
 	@if [ -f $(OBJDIR)/$(TARGET).elf ]; then echo; echo "Previous size:"; $(ELFSIZE); fi