diff --git a/tools/testing/radix-tree/Makefile b/tools/testing/radix-tree/Makefile
index 604212db9d4bd208d68aac982bbb71fbbe8194e8..43febba864bd05ff63f258d7e0180490f176c491 100644
--- a/tools/testing/radix-tree/Makefile
+++ b/tools/testing/radix-tree/Makefile
@@ -13,7 +13,7 @@ main:	$(OFILES)
 clean:
 	$(RM) -f $(TARGETS) *.o radix-tree.c
 
-$(OFILES): *.h */*.h
+$(OFILES): *.h */*.h ../../../include/linux/radix-tree.h ../../include/linux/*.h
 
 radix-tree.c: ../../../lib/radix-tree.c
 	sed -e 's/^static //' -e 's/__always_inline //' -e 's/inline //' < $< > $@