diff --git a/org.jdrupes.vmoperator.manager/src/org/jdrupes/vmoperator/manager/PoolMonitor.java b/org.jdrupes.vmoperator.manager/src/org/jdrupes/vmoperator/manager/PoolMonitor.java
index 00033ba..e11f667 100644
--- a/org.jdrupes.vmoperator.manager/src/org/jdrupes/vmoperator/manager/PoolMonitor.java
+++ b/org.jdrupes.vmoperator.manager/src/org/jdrupes/vmoperator/manager/PoolMonitor.java
@@ -170,7 +170,7 @@ public class PoolMonitor extends
      */
     @Handler
     public void onGetPools(GetPools event) {
-        event.setResult(pools.values().stream()
+        event.setResult(pools.values().stream().filter(VmPool::isDefined)
             .filter(p -> event.name().isEmpty()
                 || p.name().equals(event.name().get()))
             .filter(p -> event.forUser().isEmpty() && event.forRoles().isEmpty()