diff --git a/tools/testing/radix-tree/Makefile b/tools/testing/radix-tree/Makefile
index 3635e4d3eca7fcd8dae99f740c587b7ac02162b9..7f7600424b1489388d4c56f773d805acdd85c219 100644
--- a/tools/testing/radix-tree/Makefile
+++ b/tools/testing/radix-tree/Makefile
@@ -23,6 +23,7 @@ find_next_bit.o: ../../lib/find_bit.c
 
 $(OFILES): *.h */*.h \
 	../../include/linux/*.h \
+	../../include/asm/*.h \
 	../../../include/linux/radix-tree.h
 
 radix-tree.c: ../../../lib/radix-tree.c