diff --git a/core/rtw_xmit.c b/core/rtw_xmit.c
index f9e59b8..d3a36a2 100644
--- a/core/rtw_xmit.c
+++ b/core/rtw_xmit.c
@@ -3487,11 +3487,7 @@ void rtw_init_xmitframe(struct xmit_frame *pxframe)
 
 #ifdef CONFIG_USB_HCI
 		pxframe->pkt = NULL;
-#ifdef USB_PACKET_OFFSET_SZ
 		pxframe->pkt_offset = (PACKET_OFFSET_SZ / 8);
-#else
-		pxframe->pkt_offset = 1;/* default use pkt_offset to fill tx desc */
-#endif
 
 #ifdef CONFIG_USB_TX_AGGREGATION
 		pxframe->agg_num = 1;
diff --git a/include/rtw_xmit.h b/include/rtw_xmit.h
index 6c718d5..7df0ccd 100644
--- a/include/rtw_xmit.h
+++ b/include/rtw_xmit.h
@@ -206,11 +206,7 @@
 #endif
 
 #ifdef CONFIG_USB_HCI
-	#ifdef USB_PACKET_OFFSET_SZ
-		#define PACKET_OFFSET_SZ (USB_PACKET_OFFSET_SZ)
-	#else
-		#define PACKET_OFFSET_SZ (8)
-	#endif
+	#define PACKET_OFFSET_SZ (8)
 	#define TXDESC_OFFSET (TXDESC_SIZE + PACKET_OFFSET_SZ)
 #endif
 
diff --git a/os_dep/linux/usb_ops_linux.c b/os_dep/linux/usb_ops_linux.c
index a05446e..16fc944 100644
--- a/os_dep/linux/usb_ops_linux.c
+++ b/os_dep/linux/usb_ops_linux.c
@@ -631,9 +631,6 @@ u32 usb_write_port(struct intf_hdl *pintfhdl, u32 addr, u32 cnt, u8 *wmem)
 #endif /* CONFIG_USE_USB_BUFFER_ALLOC_TX */
 
 #ifdef USB_PACKET_OFFSET_SZ
-#if (USB_PACKET_OFFSET_SZ == 0)
-	purb->transfer_flags |= URB_ZERO_PACKET;
-#endif
 #endif
 
 #if 0