diff --git a/core/rtw_ieee80211.c b/core/rtw_ieee80211.c
index 3ba3f61..045b285 100644
--- a/core/rtw_ieee80211.c
+++ b/core/rtw_ieee80211.c
@@ -1094,7 +1094,7 @@ static int rtw_ieee802_11_parse_vendor_specific(u8 *pos, uint elen,
  * @show_errors: Whether to show parsing errors in debug log
  * Returns: Parsing result
  */
-ParseRes rtw_ieee802_11_parse_elems(u8 *start, uint len,
+enum ParseRes rtw_ieee802_11_parse_elems(u8 *start, uint len,
 				struct rtw_ieee802_11_elems *elems,
 				int show_errors)
 {
diff --git a/include/ieee80211.h b/include/ieee80211.h
index 58a5e4c..1f4c434 100644
--- a/include/ieee80211.h
+++ b/include/ieee80211.h
@@ -150,20 +150,19 @@ extern u8 RSN_CIPHER_SUITE_WRAP[];
 extern u8 RSN_CIPHER_SUITE_CCMP[];
 extern u8 RSN_CIPHER_SUITE_WEP104[];
 
-typedef enum _RATR_TABLE_MODE{
+enum RATR_TABLE_MODE {
 	RATR_INX_WIRELESS_NGB = 0,	/*  BGN 40 Mhz 2SS 1SS */
-	RATR_INX_WIRELESS_NG = 1,		/*  GN or N */
-	RATR_INX_WIRELESS_NB = 2,		/*  BGN 20 Mhz 2SS 1SS  or BN */
+	RATR_INX_WIRELESS_NG = 1,	/*  GN or N */
+	RATR_INX_WIRELESS_NB = 2,	/*  BGN 20 Mhz 2SS 1SS  or BN */
 	RATR_INX_WIRELESS_N = 3,
 	RATR_INX_WIRELESS_GB = 4,
 	RATR_INX_WIRELESS_G = 5,
 	RATR_INX_WIRELESS_B = 6,
 	RATR_INX_WIRELESS_MC = 7,
 	RATR_INX_WIRELESS_AC_N = 8,
-}RATR_TABLE_MODE, *PRATR_TABLE_MODE;
+};
 
-enum NETWORK_TYPE
-{
+enum NETWORK_TYPE {
     WIRELESS_INVALID = 0,
     /* Sub-Element */
     WIRELESS_11B = BIT(0), /*  tx: cck only , rx: cck only, hw: cck */
@@ -201,7 +200,7 @@ enum NETWORK_TYPE
 #define IsSupportedTxMCS(NetType) ((NetType) & (WIRELESS_11_24N|WIRELESS_11_5N) ? true : false)
 
 
-typedef struct ieee_param {
+struct ieee_param {
 	u32 cmd;
 	u8 sta_addr[ETH_ALEN];
 	union {
@@ -242,16 +241,16 @@ typedef struct ieee_param {
 #endif
 
 	} u;
-}ieee_param;
+};
 
 #ifdef CONFIG_AP_MODE
-typedef struct ieee_param_ex {
+struct ieee_param_ex {
 	u32 cmd;
 	u8 sta_addr[ETH_ALEN];
 	u8 data[0];
-}ieee_param_ex;
+};
 
-struct sta_data{
+struct sta_data {
 	u16 aid;
 	u16 capability;
 	int flags;
@@ -978,12 +977,10 @@ extern __inline int is_zero_mac_addr(const u8 *addr)
 #define CFG_IEEE80211_RESERVE_FCS (1<<0)
 #define CFG_IEEE80211_COMPUTE_FCS (1<<1)
 
-typedef struct tx_pending_t{
+struct tx_pending_t {
 	int frag;
 	struct ieee80211_txb *txb;
-}tx_pending_t;
-
-
+};
 
 #define MAXTID	16
 
@@ -1215,9 +1212,13 @@ struct rtw_ieee802_11_elems {
 	u8 vendor_ht_cap_len;
 };
 
-typedef enum { ParseOK = 0, ParseUnknown = 1, ParseFailed = -1 } ParseRes;
+enum ParseRes {
+	ParseOK = 0,
+	ParseUnknown = 1,
+	ParseFailed = -1
+};
 
-ParseRes rtw_ieee802_11_parse_elems(u8 *start, uint len,
+enum ParseRes rtw_ieee802_11_parse_elems(u8 *start, uint len,
 				struct rtw_ieee802_11_elems *elems,
 				int show_errors);