Index: /trunk/src/VBox/Devices/Network/SrvIntNetR0.cpp
===================================================================
--- /trunk/src/VBox/Devices/Network/SrvIntNetR0.cpp	(revision 38936)
+++ /trunk/src/VBox/Devices/Network/SrvIntNetR0.cpp	(revision 38937)
@@ -1472,13 +1472,8 @@
                 pDstTab->aIfs[iIfDst].pIf            = pIf;
                 pDstTab->aIfs[iIfDst].fReplaceDstMac = fExact;
-                /*
-                 * We need to compare an updated destination address against host's address.
-                 * If we compare the address extracted from the packet it will match host's MAC
-                 * and will be passed up the stack which will cause duplicates if IP forwarding
-                 * is enabled on the host (see #5905).
-                 */
+                intnetR0BusyIncIf(pIf);
+
                 if (fExact)
-                    pDstMacAddr = &pIf->MacAddr;
-                intnetR0BusyIncIf(pIf);
+                    pDstMacAddr = &pIf->MacAddr; /* Avoids duplicates being sent to the host. */
             }
         }