diff --git a/drivers/staging/vt6655/rxtx.c b/drivers/staging/vt6655/rxtx.c
index 82380f3ed05b..380b879c05db 100644
--- a/drivers/staging/vt6655/rxtx.c
+++ b/drivers/staging/vt6655/rxtx.c
@@ -1088,7 +1088,7 @@ s_cbFillTxBufHead(struct vnt_private *pDevice, unsigned char byPktType,
 
 
 	/* Set RrvTime/RTS/CTS Buffer */
-	wTxBufSize = sizeof(STxBufHead);
+	wTxBufSize = sizeof(struct vnt_tx_fifo_head);
 	if (byPktType == PK_TYPE_11GB || byPktType == PK_TYPE_11GA) {/* 802.11g packet */
 
 		if (byFBOption == AUTO_FB_NONE) {