diff --git a/src/add-ons/kernel/file_systems/nfs4/Inode.cpp b/src/add-ons/kernel/file_systems/nfs4/Inode.cpp
index 3fcaab1543..1a50bb6834 100644
--- a/src/add-ons/kernel/file_systems/nfs4/Inode.cpp
+++ b/src/add-ons/kernel/file_systems/nfs4/Inode.cpp
@@ -15,6 +15,9 @@
 #include "Request.h"
 
 
+vint64 OpenFileCookie::fLastOwnerId = 0;
+
+
 Inode::Inode()
 {
 }
@@ -395,6 +398,7 @@ Inode::Open(int mode, OpenFileCookie* cookie)
 
 	cookie->fHandle = fHandle;
 	cookie->fMode = mode;
+	cookie->fSequence = 0;
 
 	do {
 		cookie->fClientId = fFilesystem->NFSServer()->ClientId();
@@ -402,13 +406,11 @@ Inode::Open(int mode, OpenFileCookie* cookie)
 		Request request(fFilesystem->Server());
 		RequestBuilder& req = request.Builder();
 
-		cookie->fOwnerTime = time(NULL);
-		cookie->fOwnerTID = find_thread(NULL);
+		cookie->fOwnerId = atomic_add64(&cookie->fLastOwnerId, 1);
 
 		req.PutFH(fParentFH);
-		req.Open(CLAIM_NULL, fFilesystem->NFSServer()->SequenceId(),
-			OPEN4_SHARE_ACCESS_READ, cookie->fClientId, OPEN4_NOCREATE,
-			cookie->fOwnerTime, cookie->fOwnerTID, fName);
+		req.Open(CLAIM_NULL, cookie->fSequence++, OPEN4_SHARE_ACCESS_READ,
+			cookie->fClientId, OPEN4_NOCREATE, cookie->fOwnerId, fName);
 
 		result = request.Send();
 		if (result != B_OK)
@@ -434,7 +436,6 @@ Inode::Open(int mode, OpenFileCookie* cookie)
 		if (result != B_OK)
 			return result;
 
-
 		result = reply.Open(cookie->fStateId, &cookie->fStateSeq, &confirm);
 		if (result != B_OK)
 			return result;
@@ -450,8 +451,8 @@ Inode::Open(int mode, OpenFileCookie* cookie)
 		RequestBuilder& req = request.Builder();
 
 		req.PutFH(fHandle);
-		req.OpenConfirm(fFilesystem->NFSServer()->SequenceId(),
-			cookie->fStateId, cookie->fStateSeq);
+		req.OpenConfirm(cookie->fSequence++, cookie->fStateId,
+			cookie->fStateSeq);
 
 		result = request.Send();
 		if (result != B_OK) {
@@ -488,7 +489,7 @@ Inode::Close(OpenFileCookie* cookie)
 		RequestBuilder& req = request.Builder();
 
 		req.PutFH(fHandle);
-		req.Close(fFilesystem->NFSServer()->SequenceId(), cookie->fStateId,
+		req.Close(cookie->fSequence++, cookie->fStateId,
 			cookie->fStateSeq);
 
 		status_t result = request.Send();
diff --git a/src/add-ons/kernel/file_systems/nfs4/Inode.h b/src/add-ons/kernel/file_systems/nfs4/Inode.h
index d8c7520dda..d60873a98a 100644
--- a/src/add-ons/kernel/file_systems/nfs4/Inode.h
+++ b/src/add-ons/kernel/file_systems/nfs4/Inode.h
@@ -19,19 +19,21 @@
 
 
 struct OpenFileCookie {
-	uint64				fClientId;
+			uint64			fClientId;
 
-	uint32				fMode;
+			uint32			fMode;
 
-	Filehandle			fHandle;
-	uint32				fStateId[3];
-	uint32				fStateSeq;
+			Filehandle		fHandle;
+			uint32			fStateId[3];
+			uint32			fStateSeq;
 
-	uint32				fOwnerTime;
-	uint32				fOwnerTID;
+			uint32			fSequence;
 
-	OpenFileCookie*		fNext;
-	OpenFileCookie*		fPrev;
+			uint64			fOwnerId;
+	static	vint64			fLastOwnerId;
+
+			OpenFileCookie*	fNext;
+			OpenFileCookie*	fPrev;
 };
 
 class Inode {
diff --git a/src/add-ons/kernel/file_systems/nfs4/NFS4Server.cpp b/src/add-ons/kernel/file_systems/nfs4/NFS4Server.cpp
index 3eab8ab502..2a0d7b1e49 100644
--- a/src/add-ons/kernel/file_systems/nfs4/NFS4Server.cpp
+++ b/src/add-ons/kernel/file_systems/nfs4/NFS4Server.cpp
@@ -17,7 +17,6 @@ NFS4Server::NFS4Server(RPC::Server* serv)
 	fThreadCancel(true),
 	fLeaseTime(0),
 	fCIDUseCount(0),
-	fSequenceId(0),
 	fOpenFiles(NULL),
 	fServer(serv)
 {
@@ -72,11 +71,10 @@ NFS4Server::_ReclaimOpen(OpenFileCookie* cookie)
 	RequestBuilder& req = request.Builder();
 
 	req.PutFH(cookie->fHandle);
-	req.Open(CLAIM_PREVIOUS, SequenceId(), OPEN4_SHARE_ACCESS_READ,
-		cookie->fClientId, OPEN4_NOCREATE, cookie->fOwnerTime,
-		cookie->fOwnerTID, NULL);
+	req.Open(CLAIM_PREVIOUS, cookie->fSequence++, OPEN4_SHARE_ACCESS_READ,
+		cookie->fClientId, OPEN4_NOCREATE, cookie->fOwnerId, NULL);
 
-	status_t result = request.Send();
+	status_t result = request.Send();;
 	if (result != B_OK)
 		return result;
 
@@ -95,7 +93,8 @@ NFS4Server::_ReclaimOpen(OpenFileCookie* cookie)
 		request.Reset();
 
 		req.PutFH(cookie->fHandle);
-		req.OpenConfirm(SequenceId(), cookie->fStateId, cookie->fStateSeq);
+		req.OpenConfirm(cookie->fSequence++, cookie->fStateId,
+			cookie->fStateSeq);
 
 		result = request.Send();
 		if (result != B_OK)
diff --git a/src/add-ons/kernel/file_systems/nfs4/NFS4Server.h b/src/add-ons/kernel/file_systems/nfs4/NFS4Server.h
index 1bdc5a9f66..ebe83d2ade 100644
--- a/src/add-ons/kernel/file_systems/nfs4/NFS4Server.h
+++ b/src/add-ons/kernel/file_systems/nfs4/NFS4Server.h
@@ -28,8 +28,6 @@ public:
 			uint64			ClientId(uint64 prevId = 0, bool forceNew = false);
 			void			ReleaseCID(uint64 cid);
 
-	inline	uint32			SequenceId();
-
 	inline	uint32			LeaseTime();
 private:
 			status_t		_ReclaimOpen(OpenFileCookie* cookie);
@@ -48,20 +46,12 @@ private:
 			uint32			fCIDUseCount;
 			mutex			fLock;
 
-			vint32			fSequenceId;
-
 			OpenFileCookie*	fOpenFiles;
 			mutex			fOpenLock;
 
 			RPC::Server*	fServer;
 };
 
-inline uint32
-NFS4Server::SequenceId()
-{
-	return static_cast<uint32>(atomic_add(&fSequenceId, 1));
-}
-
 
 inline uint32
 NFS4Server::LeaseTime()
diff --git a/src/add-ons/kernel/file_systems/nfs4/RequestBuilder.cpp b/src/add-ons/kernel/file_systems/nfs4/RequestBuilder.cpp
index 5a97137b0e..35bcb2c1fb 100644
--- a/src/add-ons/kernel/file_systems/nfs4/RequestBuilder.cpp
+++ b/src/add-ons/kernel/file_systems/nfs4/RequestBuilder.cpp
@@ -153,7 +153,7 @@ RequestBuilder::LookUpUp()
 
 status_t
 RequestBuilder::Open(OpenClaim claim, uint32 seq, uint32 access, uint64 id,
-	OpenCreate oc, uint32 ownerTime, uint32 ownerTID, const char* name)
+	OpenCreate oc, uint64 ownerId, const char* name)
 {
 	if (fProcedure != ProcCompound)
 		return B_BAD_VALUE;
@@ -168,11 +168,8 @@ RequestBuilder::Open(OpenClaim claim, uint32 seq, uint32 access, uint64 id,
 
 	char owner[128];
 	int pos = 0;
-	*(uint32*)(owner + pos) = ownerTime;
-	pos += sizeof(uint32);
-
-	*(uint32*)(owner + pos) = ownerTID;
-	pos += sizeof(uint32);
+	*(uint64*)(owner + pos) = ownerId;
+	pos += sizeof(uint64);
 
 	fRequest->Stream().AddOpaque(owner, pos);
 
diff --git a/src/add-ons/kernel/file_systems/nfs4/RequestBuilder.h b/src/add-ons/kernel/file_systems/nfs4/RequestBuilder.h
index c13ea4365e..a557c65344 100644
--- a/src/add-ons/kernel/file_systems/nfs4/RequestBuilder.h
+++ b/src/add-ons/kernel/file_systems/nfs4/RequestBuilder.h
@@ -33,8 +33,7 @@ public:
 			status_t				LookUpUp();
 			status_t				Open(OpenClaim claim, uint32 seq,
 										uint32 access, uint64 id, OpenCreate oc,
-										uint32 ownerTime, uint32 ownerTID,
-										const char* name);
+										uint64 ownerId, const char* name);
 			status_t				OpenConfirm(uint32 seq, const uint32* id,
 										uint32 stateSeq);
 			status_t				PutFH(const Filehandle& fh);