diff --git a/include/wifi.h b/include/wifi.h
index d12d3d3..3c441cc 100644
--- a/include/wifi.h
+++ b/include/wifi.h
@@ -1063,14 +1063,16 @@ typedef enum _HT_CAP_AMPDU_DENSITY {
 #define IEEE80211_DELBA_PARAM_TID_MASK 0xF000
 #define IEEE80211_DELBA_PARAM_INITIATOR_MASK 0x0800
 
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 18, 0))
+
 /*
  * 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
+#endif
 
 /* Spatial Multiplexing Power Save Modes */
 #define WLAN_HT_CAP_SM_PS_STATIC		0