diff --git a/board/Synology/ds109/ds109.h b/board/Synology/ds109/ds109.h
index 95d924cf..a57cda7 100644
--- a/board/Synology/ds109/ds109.h
+++ b/board/Synology/ds109/ds109.h
@@ -9,8 +9,8 @@
 #ifndef __DS109_H
 #define __DS109_H
 
-#define DS109_OE_LOW			(~(0))
-#define DS109_OE_HIGH			(~(0))
+#define DS109_OE_LOW			(0)
+#define DS109_OE_HIGH			(0)
 #define DS109_OE_VAL_LOW		((1 << 22)|(1 << 23))
 #define DS109_OE_VAL_HIGH		((1 << 1)|1)