diff --git a/jvcl/run/JvPageList.pas b/jvcl/run/JvPageList.pas
index d4f87f35cc..f7279a439e 100644
--- a/jvcl/run/JvPageList.pas
+++ b/jvcl/run/JvPageList.pas
@@ -38,23 +38,11 @@ interface
   {$IFDEF COMPILER9_UP}
   Types,
   {$ENDIF COMPILER9_UP}
-  JvComponent, JvThemes;
+  JvComponent, JvThemes, JvPageListInterface;
 
 type
   EPageListError = class(Exception);
 
-  IPageList = interface
-    ['{6BB90183-CFB1-4431-9CFD-E9A032E0C94C}']
-    function CanChange(AIndex: Integer): Boolean;
-    procedure SetActivePageIndex(AIndex: Integer);
-    function GetPageCount: Integer;
-    function GetPageCaption(AIndex: Integer): string;
-    procedure AddPage(const ACaption: string);
-    procedure DeletePage(Index: Integer);
-    procedure MovePage(CurIndex, NewIndex: Integer);
-    procedure PageCaptionChanged(Index: Integer; const NewCaption: string);
-  end;
-
   TJvCustomPageList = class;
 
   TJvPagePaintEvent = procedure(Sender: TObject; ACanvas: TCanvas; ARect: TRect) of object;
diff --git a/jvcl/run/JvPageListInterface.pas b/jvcl/run/JvPageListInterface.pas
new file mode 100644
index 0000000000..1b086f6f0c
--- /dev/null
+++ b/jvcl/run/JvPageListInterface.pas
@@ -0,0 +1,45 @@
+{-----------------------------------------------------------------------------
+The contents of this file are subject to the Mozilla Public License
+Version 1.1 (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.mozilla.org/MPL/MPL-1.1.html
+
+Software distributed under the License is distributed on an "AS IS" basis,
+WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
+the specific language governing rights and limitations under the License.
+
+The Original Code is: JvPageListInterface.pas, released on 2019-04-25.
+
+The Initial Developer of the Original Code is Markus Humm <Markus dott Humm att gmail dott com>
+Portions created by Markus Humm are Copyright (C) 2019 Markus Humm
+All Rights Reserved.
+
+Contributor(s):
+
+You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
+located at http://jvcl.delphi-jedi.org
+
+Known Issues:
+-----------------------------------------------------------------------------}
+// $Id$
+
+unit JvPageListInterface;
+
+interface
+
+type
+  IPageList = interface
+    ['{6BB90183-CFB1-4431-9CFD-E9A032E0C94C}']
+    function CanChange(AIndex: Integer): Boolean;
+    procedure SetActivePageIndex(AIndex: Integer);
+    function GetPageCount: Integer;
+    function GetPageCaption(AIndex: Integer): string;
+    procedure AddPage(const ACaption: string);
+    procedure DeletePage(Index: Integer);
+    procedure MovePage(CurIndex, NewIndex: Integer);
+    procedure PageCaptionChanged(Index: Integer; const NewCaption: string);
+  end;
+
+implementation
+
+end.
diff --git a/jvcl/run/JvTabBar.pas b/jvcl/run/JvTabBar.pas
index 83f085e764..f47803da39 100644
--- a/jvcl/run/JvTabBar.pas
+++ b/jvcl/run/JvTabBar.pas
@@ -39,7 +39,7 @@ interface
   {$IFDEF HAS_UNIT_SYSTEM_UITYPES}
   System.UITypes,
   {$ENDIF HAS_UNIT_SYSTEM_UITYPES}
-  JvThemes;
+  JvThemes, JvPageListInterface;
 
 type
   TJvCustomTabBar = class;
@@ -52,18 +52,6 @@   TJvTabBarItem = class;
   TJvGetModifiedEvent = procedure(Sender: TJvTabBarItem; var Modified: Boolean) of object;
   TJvGetEnabledEvent = procedure(Sender: TJvTabBarItem; var Enabled: Boolean) of object;
 
-  IPageList = interface
-    ['{6BB90183-CFB1-4431-9CFD-E9A032E0C94C}']
-    function CanChange(AIndex: Integer): Boolean;
-    procedure SetActivePageIndex(AIndex: Integer);
-    function GetPageCount: Integer;
-    function GetPageCaption(AIndex: Integer): string;
-    procedure AddPage(const ACaption: string);
-    procedure DeletePage(Index: Integer);
-    procedure MovePage(CurIndex, NewIndex: Integer);
-    procedure PageCaptionChanged(Index: Integer; const NewCaption: string);
-  end;
-
   TJvTabBarItem = class(TCollectionItem)
   private
     FLeft: Integer; // used for calculating DisplayRect