diff --git a/Makefile b/Makefile
index 5238fcf..44ba6f9 100644
--- a/Makefile
+++ b/Makefile
@@ -30,7 +30,7 @@ clean:
 	rm -f $(OBJECTS)
 	rm -rf *.dSYM
 	rm -f depend.mk
-	rm -f test{1,3}{,_latency}{,.o}
+	rm -f test1 test3 test1.o test3.o test1_latency test3_latency test1_latency.o test3_latency.o
 
 depend.mk:
 	gcc $(CFLAGS) -M *.c > $@