diff --git a/src/wave/model/ocb-wifi-mac.cc b/src/wave/model/ocb-wifi-mac.cc
index 1a522ca0c..166e5276f 100644
--- a/src/wave/model/ocb-wifi-mac.cc
+++ b/src/wave/model/ocb-wifi-mac.cc
@@ -190,7 +190,7 @@ OcbWifiMac::Enqueue (Ptr<const Packet> packet, Mac48Address to)
       // Any value greater than 7 is invalid and likely indicates that
       // the packet had no QoS tag, so we revert to zero, which'll
       // mean that AC_BE is used.
-      if (tid >= 7)
+      if (tid > 7)
         {
           tid = 0;
         }
diff --git a/src/wifi/model/adhoc-wifi-mac.cc b/src/wifi/model/adhoc-wifi-mac.cc
index f1dcaf783..a8e671a64 100644
--- a/src/wifi/model/adhoc-wifi-mac.cc
+++ b/src/wifi/model/adhoc-wifi-mac.cc
@@ -119,7 +119,7 @@ AdhocWifiMac::Enqueue (Ptr<const Packet> packet, Mac48Address to)
       // Any value greater than 7 is invalid and likely indicates that
       // the packet had no QoS tag, so we revert to zero, which'll
       // mean that AC_BE is used.
-      if (tid >= 7)
+      if (tid > 7)
         {
           tid = 0;
         }
diff --git a/src/wifi/model/ap-wifi-mac.cc b/src/wifi/model/ap-wifi-mac.cc
index 38a56e927..94c5143a1 100644
--- a/src/wifi/model/ap-wifi-mac.cc
+++ b/src/wifi/model/ap-wifi-mac.cc
@@ -207,7 +207,7 @@ ApWifiMac::ForwardDown (Ptr<const Packet> packet, Mac48Address from,
       // Any value greater than 7 is invalid and likely indicates that
       // the packet had no QoS tag, so we revert to zero, which'll
       // mean that AC_BE is used.
-      if (tid >= 7)
+      if (tid > 7)
         {
           tid = 0;
         }
diff --git a/src/wifi/model/sta-wifi-mac.cc b/src/wifi/model/sta-wifi-mac.cc
index 7281cb6c0..45cc7403b 100644
--- a/src/wifi/model/sta-wifi-mac.cc
+++ b/src/wifi/model/sta-wifi-mac.cc
@@ -377,7 +377,7 @@ StaWifiMac::Enqueue (Ptr<const Packet> packet, Mac48Address to)
       // Any value greater than 7 is invalid and likely indicates that
       // the packet had no QoS tag, so we revert to zero, which'll
       // mean that AC_BE is used.
-      if (tid >= 7)
+      if (tid > 7)
         {
           tid = 0;
         }