diff --git a/drivers/staging/rtl8192u/ieee80211/rtl819x_Qos.h b/drivers/staging/rtl8192u/ieee80211/rtl819x_Qos.h
index 810d81addcf62030d741993cc6418383e933996b..1f16d1692c03853560ca8b50ac7446346042e6f4 100644
--- a/drivers/staging/rtl8192u/ieee80211/rtl819x_Qos.h
+++ b/drivers/staging/rtl8192u/ieee80211/rtl819x_Qos.h
@@ -2,19 +2,16 @@
 #ifndef __INC_QOS_TYPE_H
 #define __INC_QOS_TYPE_H
 
-//
-// ACI/AIFSN Field.
-// Ref: WMM spec 2.2.2: WME Parameter Element, p.12.
-//
-union aci_aifsn {
-	u8	char_data;
-
-	struct {
-		u8	aifsn:4;
-		u8	acm:1;
-		u8	aci:2;
-		u8	reserved:1;
-	} f;	// Field
+/*
+ * ACI/AIFSN Field.
+ * Ref: WMM spec 2.2.2: WME Parameter Element, p.12.
+ * Note: 1 Byte Length
+ */
+struct aci_aifsn {
+	u8	aifsn:4;
+	u8	acm:1;
+	u8	aci:2;
+	u8:1;
 };
 
 //
diff --git a/drivers/staging/rtl8192u/r8192U_dm.c b/drivers/staging/rtl8192u/r8192U_dm.c
index 92ba1fdd98310c1514a97e32615848678335d29b..0ba1b1e2bc6e8a12289d3e76509be0c4d73fe541 100644
--- a/drivers/staging/rtl8192u/r8192U_dm.c
+++ b/drivers/staging/rtl8192u/r8192U_dm.c
@@ -2242,12 +2242,12 @@ static void dm_check_edca_turbo(
 			{
 				/*  TODO:  Modified this part and try to set acm control in only 1 IO processing!! */
 
-				union aci_aifsn *pAciAifsn = (union aci_aifsn *)&(qos_parameters->aifs[0]);
+				struct aci_aifsn *pAciAifsn = (struct aci_aifsn *)&(qos_parameters->aifs[0]);
 				u8		AcmCtrl;
 
 				read_nic_byte(dev, AcmHwCtrl, &AcmCtrl);
 
-				if (pAciAifsn->f.acm) { /*  acm bit is 1. */
+				if (pAciAifsn->acm) { /*  acm bit is 1. */
 					AcmCtrl |= AcmHw_BeqEn;
 				} else {	/* ACM bit is 0. */
 					AcmCtrl &= (~AcmHw_BeqEn);