diff --git a/k4FWCore/components/IIOSvc.h b/k4FWCore/components/IIOSvc.h
index fe767612..4ac88d0c 100644
--- a/k4FWCore/components/IIOSvc.h
+++ b/k4FWCore/components/IIOSvc.h
@@ -1,14 +1,23 @@
-/*****************************************************************************\
-* (c) Copyright 2000-2019 CERN for the benefit of the LHCb Collaboration      *
-*                                                                             *
-* This software is distributed under the terms of the GNU General Public      *
-* Licence version 3 (GPL Version 3), copied verbatim in the file "COPYING".   *
-*                                                                             *
-* In applying this licence, CERN does not waive the privileges and immunities *
-* granted to it by virtue of its status as an Intergovernmental Organization  *
-* or submit itself to any jurisdiction.                                       *
-\*****************************************************************************/
-#pragma once
+/*
+ * Copyright (c) 2014-2023 Key4hep-Project.
+ *
+ * This file is part of Key4hep.
+ * See https://key4hep.github.io/key4hep-doc/ for further info.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef FWCORE_IIOSVC_H
+#define FWCORE_IIOSVC_H
 
 #include "GaudiKernel/IInterface.h"
 
@@ -23,21 +32,23 @@
  * The interface implemented by any class making IO and reading RawEvent Data
  */
 class IIOSvc : virtual public IInterface {
-
 public:
   struct EndOfInput : std::logic_error {
-    EndOfInput() : logic_error( "Reached end of input while more data were expected" ){};
+    EndOfInput() : logic_error("Reached end of input while more data were expected"){};
   };
 
 public:
   /// InterfaceID
-  DeclareInterfaceID( IIOSvc, 1, 0 );
+  DeclareInterfaceID(IIOSvc, 1, 0);
 
-  virtual std::tuple<std::vector<std::shared_ptr<podio::CollectionBase>>, std::vector<std::string>, podio::Frame> next( ) = 0;
+  virtual std::tuple<std::vector<std::shared_ptr<podio::CollectionBase>>, std::vector<std::string>, podio::Frame>
+                                                    next()                     = 0;
   virtual std::shared_ptr<std::vector<std::string>> getCollectionNames() const = 0;
 
-  virtual std::shared_ptr<podio::ROOTWriter> getWriter() = 0;
-  virtual void deleteWriter() = 0;
-  virtual void deleteReader() = 0;
-  virtual bool writeCollection( const std::string& collName) = 0;
+  virtual std::shared_ptr<podio::ROOTWriter> getWriter()                                  = 0;
+  virtual void                               deleteWriter()                               = 0;
+  virtual void                               deleteReader()                               = 0;
+  virtual bool                               writeCollection(const std::string& collName) = 0;
 };
+
+#endif
diff --git a/k4FWCore/components/Reader.cpp b/k4FWCore/components/Reader.cpp
index f8aaa640..4f691cf9 100644
--- a/k4FWCore/components/Reader.cpp
+++ b/k4FWCore/components/Reader.cpp
@@ -23,11 +23,11 @@
 #include "GaudiKernel/AnyDataWrapper.h"
 #include "GaudiKernel/IDataProviderSvc.h"
 
-#include "IIOSvc.h"
 
 #include "podio/CollectionBase.h"
 #include "podio/Frame.h"
 
+#include "IIOSvc.h"
 #include "k4FWCore/FunctionalUtils.h"
 
 #include <memory>