diff --git a/drivers/staging/winbond/mds_f.h b/drivers/staging/winbond/mds_f.h
index ce5a78c27ce0..159b2eb366e8 100644
--- a/drivers/staging/winbond/mds_f.h
+++ b/drivers/staging/winbond/mds_f.h
@@ -9,7 +9,6 @@ void Mds_Tx(struct wbsoft_priv *adapter);
 void Mds_SendComplete(struct wbsoft_priv *adapter, struct T02_descriptor *pt02);
 void Mds_MpduProcess(struct wbsoft_priv *adapter,
 		     struct wb35_descriptor *prxdes);
-extern void DataDmp(u8 *pdata, u32 len, u32 offset);
 
 /* For data frame sending */
 u16 MDS_GetPacketSize(struct wbsoft_priv *adapter);