diff --git a/Makefile.in b/Makefile.in
index b8fde5e..3adc586 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -73,6 +73,7 @@ distclean : clean
 	-rm -f .DS_Store
 	-rm -f Makefile
 	$(MAKE) -C doc distclean
+	$(MAKE) -C test/unit distclean
 
 clean :
 	-rm -f *.o *.s chronyc chronyd core *~
diff --git a/test/unit/Makefile.in b/test/unit/Makefile.in
index 5fd925c..554663b 100644
--- a/test/unit/Makefile.in
+++ b/test/unit/Makefile.in
@@ -33,6 +33,9 @@ clean:
 	rm -f *.o $(TESTS)
 	rm -rf .deps
 
+distclean: clean
+	rm -f Makefile
+
 .deps:
 	@mkdir .deps