diff --git a/src/wifi/test/wifi-test.cc b/src/wifi/test/wifi-test.cc
index 00d8fd564..84b78c043 100644
--- a/src/wifi/test/wifi-test.cc
+++ b/src/wifi/test/wifi-test.cc
@@ -68,7 +68,7 @@ AssignWifiRandomStreams (Ptr<WifiMac> mac, int64_t stream)
 
       rmac->GetAttribute ("BK_EdcaTxopN", ptr);
       Ptr<EdcaTxopN> bk_edcaTxopN = ptr.Get<EdcaTxopN> ();
-      currentStream += bk_edcaTxopN->AssignStreams (currentStream);
+      bk_edcaTxopN->AssignStreams (currentStream);
     }
 }