diff --git a/repos/os/include/file_system/util.h b/repos/os/include/file_system/util.h
index 3bd5c192c2..ffc879ab37 100644
--- a/repos/os/include/file_system/util.h
+++ b/repos/os/include/file_system/util.h
@@ -121,7 +121,6 @@ namespace File_system {
 
 			Packet_descriptor
 				packet(source.alloc_packet(curr_packet_size),
-				       0,
 				       node_handle,
 				       File_system::Packet_descriptor::READ,
 				       curr_packet_size,
@@ -178,7 +177,6 @@ namespace File_system {
 
 			Packet_descriptor
 				packet(source.alloc_packet(curr_packet_size),
-				       0,
 				       node_handle,
 				       File_system::Packet_descriptor::WRITE,
 				       curr_packet_size,
diff --git a/repos/os/include/file_system_session/file_system_session.h b/repos/os/include/file_system_session/file_system_session.h
index 1112fddfa5..d1a03938c6 100644
--- a/repos/os/include/file_system_session/file_system_session.h
+++ b/repos/os/include/file_system_session/file_system_session.h
@@ -28,15 +28,6 @@ namespace File_system {
 	struct Dir_handle;
 	struct Symlink_handle;
 
-	/**
-	 * Type of client context embedded in each packet descriptor
-	 *
-	 * Using the opaque refererence, the client is able to attribute incoming
-	 * packet acknowledgements to a context that is meaningful for the client.
-	 * It has no meaning at the server side.
-	 */
-	struct Packet_ref;
-
 	typedef Genode::uint64_t seek_off_t;
 	typedef Genode::uint64_t file_size_t;
 
@@ -123,8 +114,6 @@ class File_system::Packet_descriptor : public Genode::Packet_descriptor
 		seek_off_t  _position; /* seek offset in bytes */
 		size_t      _length;   /* transaction length in bytes */
 		bool        _success;  /* indicates success of operation */
-		Packet_ref *_ref;      /* opaque reference used at the client side
-		                          for recognizing acknowledgements */
 
 	public:
 
@@ -141,14 +130,13 @@ class File_system::Packet_descriptor : public Genode::Packet_descriptor
 		 *
 		 * \param position  seek offset in bytes (by default, append)
 		 */
-		Packet_descriptor(Packet_descriptor p, Packet_ref *ref,
+		Packet_descriptor(Packet_descriptor p,
 		                  Node_handle handle, Opcode op, size_t length,
 		                  seek_off_t position = ~0)
 		:
 			Genode::Packet_descriptor(p.offset(), p.size()),
 			_handle(handle), _op(op),
-			_position(position), _length(length), _success(false),
-			_ref(ref)
+			_position(position), _length(length), _success(false)
 		{ }
 
 		Node_handle handle()    const { return _handle;   }
@@ -156,7 +144,6 @@ class File_system::Packet_descriptor : public Genode::Packet_descriptor
 		seek_off_t  position()  const { return _position; }
 		size_t      length()    const { return _length;   }
 		bool        succeeded() const { return _success;  }
-		Packet_ref *ref()       const { return _ref;      }
 
 		/*
 		 * Accessors called at the server side
diff --git a/repos/os/include/vfs/fs_file_system.h b/repos/os/include/vfs/fs_file_system.h
index 3817aabdd0..5322d8898d 100644
--- a/repos/os/include/vfs/fs_file_system.h
+++ b/repos/os/include/vfs/fs_file_system.h
@@ -100,7 +100,6 @@ class Vfs::Fs_file_system : public File_system
 
 			::File_system::Packet_descriptor const
 				packet_in(source.alloc_packet(clipped_count),
-				          0,
 				          node_handle,
 				          ::File_system::Packet_descriptor::READ,
 				          clipped_count,
@@ -137,7 +136,6 @@ class Vfs::Fs_file_system : public File_system
 
 			::File_system::Packet_descriptor
 				packet(source.alloc_packet(count),
-				       0,
 				       node_handle,
 				       ::File_system::Packet_descriptor::WRITE,
 				       count,
@@ -217,7 +215,6 @@ class Vfs::Fs_file_system : public File_system
 
 					::File_system::Packet_descriptor
 						packet(source.alloc_packet(count),
-							   0,
 							   file,
 							   ::File_system::Packet_descriptor::READ,
 							   count,
@@ -298,7 +295,6 @@ class Vfs::Fs_file_system : public File_system
 
 			::File_system::Packet_descriptor
 				packet(source.alloc_packet(DIRENT_SIZE),
-				       0,
 				       dir_handle,
 				       ::File_system::Packet_descriptor::READ,
 				       DIRENT_SIZE,
diff --git a/repos/os/src/server/fs_log/log_file.h b/repos/os/src/server/fs_log/log_file.h
index 44b06797ea..a7680d4b24 100644
--- a/repos/os/src/server/fs_log/log_file.h
+++ b/repos/os/src/server/fs_log/log_file.h
@@ -74,7 +74,6 @@ class Fs_log::Log_file : public List<Log_file>::Element
 
 			File_system::Packet_descriptor
 				packet(raw_packet,
-				       0, /* The result struct. */
 				       _handle, File_system::Packet_descriptor::WRITE,
 				       msg_len, _offset);
 
@@ -88,4 +87,4 @@ class Fs_log::Log_file : public List<Log_file>::Element
 		}
 };
 
-#endif
\ No newline at end of file
+#endif