diff --git a/plugins/hypervisors/xenserver/src/com/cloud/hypervisor/xenserver/resource/CitrixResourceBase.java b/plugins/hypervisors/xenserver/src/com/cloud/hypervisor/xenserver/resource/CitrixResourceBase.java
index 107b05376a2..b040633a1c3 100644
--- a/plugins/hypervisors/xenserver/src/com/cloud/hypervisor/xenserver/resource/CitrixResourceBase.java
+++ b/plugins/hypervisors/xenserver/src/com/cloud/hypervisor/xenserver/resource/CitrixResourceBase.java
@@ -3928,7 +3928,6 @@ public abstract class CitrixResourceBase implements ServerResource, HypervisorRe
                         s_logger.debug("Found unplugged VIF " + deviceId + " in VM " + vmName + " destroy it");
                         vif.destroy(conn);
                     }
-                    usedDeviceNums.add(Integer.valueOf(vif.getDevice(conn)));
                 } catch (NumberFormatException e) {
                     String msg = "Obtained an invalid value for an allocated VIF device number for VM: " + vmName;
                     s_logger.debug(msg, e);