diff --git a/src/class/net/net_device.c b/src/class/net/net_device.c
index e3faa0187..fedd4db99 100644
--- a/src/class/net/net_device.c
+++ b/src/class/net/net_device.c
@@ -90,7 +90,7 @@ static const struct ecm_notify_struct ecm_notify_csc =
 };
 
 // TODO remove CFG_TUSB_MEM_SECTION, control internal buffer is already in this special section
-CFG_TUSB_MEM_SECTION TU_ATTR_ALIGNED(4) static union
+CFG_TUSB_MEM_SECTION CFG_TUSB_MEM_ALIGN static union
 {
   uint8_t rndis_buf[120];
   struct ecm_notify_struct ecm_buf;