diff --git a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfs/v4/xdr/stateid4.java b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfs/v4/xdr/stateid4.java
index c5dfd909b9b..f6fd916302e 100644
--- a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfs/v4/xdr/stateid4.java
+++ b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfs/v4/xdr/stateid4.java
@@ -23,6 +23,7 @@
 import java.io.Serializable;
 import java.util.Arrays;
 
+@Deprecated(forRemoval = true)
 public class stateid4 implements Serializable {
 
     static final long serialVersionUID = -6677150504723505919L;
diff --git a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfs/v4/xdr/uint32_t.java b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfs/v4/xdr/uint32_t.java
index 97590396bd9..d666339bf2a 100644
--- a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfs/v4/xdr/uint32_t.java
+++ b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfs/v4/xdr/uint32_t.java
@@ -21,6 +21,7 @@
 
 import java.io.Serializable;
 
+@Deprecated(forRemoval = true)
 public class uint32_t implements Serializable {
 
     static final long serialVersionUID = -6603937444681096490L;
diff --git a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/common/LegacyUtils.java b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/common/LegacyUtils.java
new file mode 100644
index 00000000000..b831e00ca11
--- /dev/null
+++ b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/common/LegacyUtils.java
@@ -0,0 +1,26 @@
+package org.dcache.chimera.nfsv41.common;
+
+import org.dcache.nfs.v4.xdr.stateid4;
+
+/**
+ * Utility class to support removal of legacy stateid class.
+ */
+@Deprecated(forRemoval = true)
+public class LegacyUtils {
+
+    private LegacyUtils() {
+        // no instance allowed
+    }
+
+    public static stateid4 toStateid(Object stateObject) {
+        stateid4 stateid;
+        if (stateObject instanceof stateid4) {
+            stateid = (stateid4) stateObject;
+        } else {
+            org.dcache.chimera.nfs.v4.xdr.stateid4 legacyStateid
+                  = (org.dcache.chimera.nfs.v4.xdr.stateid4) stateObject;
+            stateid = new stateid4(legacyStateid.other, legacyStateid.seqid.value);
+        }
+        return stateid;
+    }
+}
diff --git a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/door/NFSv41Door.java b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/door/NFSv41Door.java
index 789bfcc3835..3c7e9e11699 100644
--- a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/door/NFSv41Door.java
+++ b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/door/NFSv41Door.java
@@ -89,6 +89,7 @@
 import org.dcache.chimera.FsInode;
 import org.dcache.chimera.FsInodeType;
 import org.dcache.chimera.JdbcFs;
+import org.dcache.chimera.nfsv41.common.LegacyUtils;
 import org.dcache.chimera.nfsv41.common.StatsDecoratedOperationExecutor;
 import org.dcache.chimera.nfsv41.door.proxy.NfsProxyIoFactory;
 import org.dcache.chimera.nfsv41.door.proxy.ProxyIoFactory;
@@ -528,8 +529,7 @@ public void destroy() throws IOException {
      * and NFSv4.1 device id. Finally, notify waiting request that we have got
      * the reply for LAYOUTGET
      */
-    public void messageArrived(
-          PoolPassiveIoFileMessage<org.dcache.chimera.nfs.v4.xdr.stateid4> message) {
+    public void messageArrived(PoolPassiveIoFileMessage<?> message) {
 
         String poolName = message.getPoolName();
         long verifier = message.getVerifier();
@@ -539,9 +539,13 @@ public void messageArrived(
 
         PoolDS device = _poolDeviceMap.getOrCreateDS(poolName, verifier, poolAddresses);
 
-        org.dcache.chimera.nfs.v4.xdr.stateid4 legacyStateid = message.challange();
-        NfsTransfer transfer = _transfers.get(
-              new stateid4(legacyStateid.other, legacyStateid.seqid.value));
+
+        // REVISIT 11.0: remove drop legacy support. Old polls will send legacy stateid.
+        // stateid4 stateid = message.challange();
+        Object stateObject = message.challange();
+        stateid4 stateid = LegacyUtils.toStateid(stateObject);
+        NfsTransfer transfer = _transfers.get(stateid);
+
         /*
          * We got a notification for a transfer which was not
          * started by us.
@@ -591,10 +595,12 @@ public void messageArrived(DoorTransferFinishedMessage transferFinishedMessage)
         }
     }
 
-    public DoorValidateMoverMessage<org.dcache.chimera.nfs.v4.xdr.stateid4> messageArrived(
-          DoorValidateMoverMessage<org.dcache.chimera.nfs.v4.xdr.stateid4> message) {
-        org.dcache.chimera.nfs.v4.xdr.stateid4 legacyStateid = message.getChallenge();
-        stateid4 stateid = new stateid4(legacyStateid.other, legacyStateid.seqid.value);
+    public DoorValidateMoverMessage<?> messageArrived(DoorValidateMoverMessage<?> message) {
+
+        // REVISIT 11.0: remove drop legacy support. Old polls will send legacy stateid.
+        // stateid4 stateid = message.getChallenge();
+        Object stateObject = message.getChallenge();
+        stateid4 stateid = LegacyUtils.toStateid(stateObject);
 
         boolean isValid = false;
         try {
diff --git a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/mover/NfsMover.java b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/mover/NfsMover.java
index 6cdd56af9ea..ce6f7e5133e 100644
--- a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/mover/NfsMover.java
+++ b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/mover/NfsMover.java
@@ -25,6 +25,7 @@
 import java.io.IOException;
 import java.io.InterruptedIOException;
 import java.nio.channels.CompletionHandler;
+import org.dcache.chimera.nfsv41.common.LegacyUtils;
 import org.dcache.nfs.ChimeraNFSException;
 import org.dcache.nfs.status.NfsIoException;
 import org.dcache.nfs.v4.NFS4State;
@@ -51,8 +52,13 @@ public NfsMover(ReplicaDescriptor handle, PoolIoFileMessage message, CellPath pa
           NfsTransferService nfsTransferService, PnfsHandler pnfsHandler) {
         super(handle, message, pathToDoor, nfsTransferService);
         _nfsTransferService = nfsTransferService;
-        org.dcache.chimera.nfs.v4.xdr.stateid4 legacyStateid = getProtocolInfo().stateId();
-        _state = new MoverState(null, new stateid4(legacyStateid.other, legacyStateid.seqid.value));
+
+        // REVISIT 11.0: remove drop legacy support
+        // stateid4 stateid = getProtocolInfo().stateId();
+        Object stateObject = getProtocolInfo().stateId();
+        stateid4 stateid = LegacyUtils.toStateid(stateObject);
+
+        _state = new MoverState(null, stateid);
         _namespace = pnfsHandler;
     }
 
diff --git a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/mover/NfsTransferService.java b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/mover/NfsTransferService.java
index 63064c86794..f222ab1e4f4 100644
--- a/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/mover/NfsTransferService.java
+++ b/modules/dcache-nfs/src/main/java/org/dcache/chimera/nfsv41/mover/NfsTransferService.java
@@ -44,6 +44,7 @@
 import javax.annotation.Nullable;
 import org.dcache.auth.Subjects;
 import org.dcache.cells.CellStub;
+import org.dcache.chimera.nfsv41.common.LegacyUtils;
 import org.dcache.chimera.nfsv41.common.StatsDecoratedOperationExecutor;
 import org.dcache.commons.stats.RequestExecutionTimeGauges;
 import org.dcache.nfs.ChimeraNFSException;
@@ -342,11 +343,16 @@ public Cancellable executeMover(final NfsMover mover,
 
     public void notifyDoorWithRedirect(NfsMover mover) {
         CellPath directDoorPath = new CellPath(mover.getPathToDoor().getDestinationAddress());
-        final org.dcache.chimera.nfs.v4.xdr.stateid4 legacyStateId = mover.getProtocolInfo()
-              .stateId();
+
+        // REVISIT 11.0: remove drop legacy support
+        // stateid4 stateid = mover.getProtocolInfo().stateId();
+        Object stateObject = mover.getProtocolInfo().stateId();
+        stateid4 stateid = LegacyUtils.toStateid(stateObject);
+
+        // never send legacy stateid.
         _door.notify(directDoorPath,
               new PoolPassiveIoFileMessage<>(_cellAddress.getCellName(), _localSocketAddresses,
-                    legacyStateId,
+                    stateid,
                     _bootVerifier));
     }