diff --git a/src/devices/wifi/wifi-mac-header.cc b/src/devices/wifi/wifi-mac-header.cc
index 78acd4d38..3d49525e8 100644
--- a/src/devices/wifi/wifi-mac-header.cc
+++ b/src/devices/wifi/wifi-mac-header.cc
@@ -317,10 +317,10 @@ void WifiMacHeader::SetQosAckPolicy (enum QosAckPolicy policy)
     m_qosAckPolicy = 0;
     break;
   case NO_ACK :
-    m_qosAckPolicy = 2;
+    m_qosAckPolicy = 1;
     break;
   case NO_EXPLICIT_ACK :
-    m_qosAckPolicy = 1;
+    m_qosAckPolicy = 2;
     break;
   case BLOCK_ACK :
     m_qosAckPolicy = 3;