diff --git a/include/wifi.h b/include/wifi.h
index 44bf7c8..ff28e7d 100644
--- a/include/wifi.h
+++ b/include/wifi.h
@@ -1027,10 +1027,8 @@ typedef enum _HT_CAP_AMPDU_DENSITY {
  * A-PMDU buffer sizes
  * According to IEEE802.11n spec size varies from 8K to 64K (in powers of 2)
  */
-#define IEEE80211_MIN_AMPDU_BUF 0x8
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0))
-#define IEEE80211_MAX_AMPDU_BUF 0x40
-#endif
+// #define IEEE80211_MIN_AMPDU_BUF 0x8
+// #define IEEE80211_MAX_AMPDU_BUF 0x40
 
 /* Spatial Multiplexing Power Save Modes */
 #define WLAN_HT_CAP_SM_PS_STATIC		0
diff --git a/os_dep/linux/os_intfs.c b/os_dep/linux/os_intfs.c
index 9595b91..67399d5 100644
--- a/os_dep/linux/os_intfs.c
+++ b/os_dep/linux/os_intfs.c
@@ -1275,13 +1275,15 @@ unsigned int rtw_classify8021d(struct sk_buff *skb)
 
 
 static u16 rtw_select_queue(struct net_device *dev, struct sk_buff *skb
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 19, 0)
-	, struct net_device *sb_dev
-#elif LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
-	, void *accel_priv
-#endif
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 0)
-	, select_queue_fallback_t fallback
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
+  #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 19, 0)
+	  , void *accel_priv
+  #else
+    , struct net_device *sb_dev
+  #endif
+  #if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 0)
+	  , select_queue_fallback_t fallback
+  #endif
 #endif
 )
 {