diff --git a/site_ansto/hardsup/makefile b/site_ansto/hardsup/makefile
index fde4b231..5915f951 100644
--- a/site_ansto/hardsup/makefile
+++ b/site_ansto/hardsup/makefile
@@ -42,3 +42,8 @@ libhlib.a: $(HOBJ)
 
 clean:
 	rm -f *.o *.d *.a
+
+DEPS := $(HOBJ:.o=.d)
+
+-include $(DEPS)
+