diff --git a/src/devices/wifi/wifi-mac-queue.cc b/src/devices/wifi/wifi-mac-queue.cc
index 95073b103..47d43a0e4 100644
--- a/src/devices/wifi/wifi-mac-queue.cc
+++ b/src/devices/wifi/wifi-mac-queue.cc
@@ -256,6 +256,7 @@ WifiMacQueue::Remove (Ptr<const Packet> packet)
       if (it->packet == packet)
         {
           m_queue.erase (it);
+          m_size--;
           return true;
         }
     }