diff --git a/Makefile b/Makefile
index 26e205db4e961cacb12b4742a08d2e0168188440..5934a7f2aba16ee0409cb72131865750bf276b15 100644
--- a/Makefile
+++ b/Makefile
@@ -13,7 +13,7 @@ fx_s2308_double.o: fx_s2308_double.c
 	$(CC) $(CFLAGS) fx_s2308_double.c
 
 clean:
-	-- rm $(OBJS)
+	- rm $(OBJS)
 	rm fx_s2308_double
 
 dep :