diff --git a/.gitattributes b/.gitattributes
index fe4a1d647d..ca1755aaef 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -8397,6 +8397,7 @@ rtl/aros/timerd.inc svneol=native#text/plain
 rtl/aros/x86_64/prt0.as svneol=native#text/plain
 rtl/atari/Makefile svneol=native#text/plain
 rtl/atari/Makefile.fpc svneol=native#text/plain
+rtl/atari/classes.pp svneol=native#text/plain
 rtl/atari/prt0.as svneol=native#text/plain
 rtl/atari/rtldefs.inc svneol=native#text/plain
 rtl/atari/sysdir.inc svneol=native#text/plain
@@ -8405,6 +8406,7 @@ rtl/atari/sysheap.inc svneol=native#text/plain
 rtl/atari/sysos.inc svneol=native#text/plain
 rtl/atari/sysosh.inc svneol=native#text/plain
 rtl/atari/system.pp svneol=native#text/plain
+rtl/atari/tthread.inc svneol=native#text/plain
 rtl/avr/avr.inc svneol=native#text/plain
 rtl/avr/int64p.inc svneol=native#text/plain
 rtl/avr/makefile.cpu svneol=native#text/plain
diff --git a/rtl/atari/classes.pp b/rtl/atari/classes.pp
new file mode 100644
index 0000000000..5f7db50c2f
--- /dev/null
+++ b/rtl/atari/classes.pp
@@ -0,0 +1,49 @@
+{
+    This file is part of the Free Component Library (FCL)
+    Copyright (c) 2016 by the Free Pascal development team
+
+    Classes unit for Atari
+
+    See the file COPYING.FPC, included in this distribution,
+    for details about the copyright.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+ **********************************************************************}
+
+{$mode objfpc}
+
+{ determine the type of the resource/form file }
+{$define Win16Res}
+
+unit Classes;
+
+interface
+
+uses
+  sysutils,
+  rtlconsts,
+  types,
+{$ifdef FPC_TESTGENERICS}
+  fgl,
+{$endif}
+  typinfo;
+
+{$i classesh.inc}
+
+
+implementation
+
+{ OS - independent class implementations are in /inc directory. }
+{$i classes.inc}
+
+
+initialization
+  CommonInit;
+
+finalization
+  CommonCleanup;
+
+end.
diff --git a/rtl/atari/tthread.inc b/rtl/atari/tthread.inc
new file mode 100644
index 0000000000..24e7e37f19
--- /dev/null
+++ b/rtl/atari/tthread.inc
@@ -0,0 +1,86 @@
+{
+    This file is part of the Free Component Library (FCL)
+    Copyright (c) 1999-2000 by the Free Pascal development team
+
+    See the file COPYING.FPC, included in this distribution,
+    for details about the copyright.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+ **********************************************************************}
+{****************************************************************************}
+{*                             TThread                                      *}
+{****************************************************************************}
+
+
+procedure TThread.CallOnTerminate;
+
+begin
+end;
+
+
+function TThread.GetPriority: TThreadPriority;
+
+begin
+  GetPriority:=tpNormal;
+end;
+
+
+procedure TThread.SetPriority(Value: TThreadPriority);
+
+begin
+end;
+
+
+procedure TThread.SetSuspended(Value: Boolean);
+
+begin
+end;
+
+
+procedure TThread.DoTerminate;
+
+begin
+end;
+
+
+procedure TThread.SysCreate(CreateSuspended: Boolean; const StackSize: SizeUInt);
+
+begin
+ {IsMultiThread := TRUE; }
+end;
+
+
+procedure TThread.SysDestroy;
+
+begin
+end;
+
+
+procedure TThread.Resume;
+
+begin
+end;
+
+
+procedure TThread.Suspend;
+
+begin
+end;
+
+
+procedure TThread.Terminate;
+
+begin
+end;
+
+
+function TThread.WaitFor: Integer;
+
+begin
+  WaitFor:=0;
+end;
+
+