diff --git a/hal/rtl8821c/pci/rtl8821ce_halmac.c b/hal/rtl8821c/pci/rtl8821ce_halmac.c
index 1100cdf..f7ae7b0 100755
--- a/hal/rtl8821c/pci/rtl8821ce_halmac.c
+++ b/hal/rtl8821c/pci/rtl8821ce_halmac.c
@@ -24,7 +24,11 @@ static u8 pci_write_port_not_xmitframe(void *d,  u32 size, u8 *pBuf, u8 qsel)
 	PADAPTER padapter = dvobj_get_primary_adapter(pobj);
 	u32 page_size = 0;
 	u8 *txbd;
+#ifdef CONFIG_64BIT
 	u64 txbd_dma;
+#else
+	dma_addr_t txbd_dma;
+#endif
 	u8 ret = _SUCCESS;
 	dma_addr_t mapping;