diff --git a/drivers/staging/rtl8188eu/core/rtw_wlan_util.c b/drivers/staging/rtl8188eu/core/rtw_wlan_util.c
index 3e0801858737..fb496ab5a862 100644
--- a/drivers/staging/rtl8188eu/core/rtw_wlan_util.c
+++ b/drivers/staging/rtl8188eu/core/rtw_wlan_util.c
@@ -454,9 +454,9 @@ void write_cam(struct adapter *padapter, u8 entry, u16 ctrl, u8 *mac, u8 *key)
 
 void clear_cam_entry(struct adapter *padapter, u8 entry)
 {
-	unsigned char null_sta[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
-	unsigned char null_key[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-				    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+	u8 null_sta[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+	u8 null_key[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+			 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 
 	write_cam(padapter, entry, 0, null_sta, null_key);
 }