diff --git a/Makefile.include b/Makefile.include
index eb5a2bc15..138416591 100644
--- a/Makefile.include
+++ b/Makefile.include
@@ -99,7 +99,7 @@ $(foreach t, $(TARGETS_WITH_ROM_VARS), $(eval $(call build_elf_rule,$(t))))
 	$(call pretty,OBJDUMP,$@)
 	$Q$(OBJDUMP) -d $< > $@ || rm -f $@
 
-%.o: %.c
+%.o: %.c $(FORCE_C_DEPENDS)
 	$(call pretty,CC,$@)
 	$Q$(CC) $(CFLAGS) $(CFLAGS_THUMB) -MMD -c -o $@ $<
 	@$(FINALIZE_DEPENDENCY)
diff --git a/board/Makefile.board b/board/Makefile.board
index 218ecd4b7..e0aad1882 100644
--- a/board/Makefile.board
+++ b/board/Makefile.board
@@ -22,7 +22,7 @@ $(OBJDIR)/board.a: $(OBJDIR)/board.h
 endif
 
 # And is built from files in the parent directory
-$(OBJDIR)/%.o: %.c $(OBJDIR)/board.h
+$(OBJDIR)/%.o: %.c $(OBJDIR)/board.h $(FORCE_C_DEPENDS)
 	$(call pretty,CC,$@)
 	$Q$(CC) $(CFLAGS) $(CFLAGS_THUMB) -MMD -c -o $@ $<
 	@$(FINALIZE_DEPENDENCY)