diff --git a/harbour/ChangeLog.txt b/harbour/ChangeLog.txt
index da97c879ff..fdce16e923 100644
--- a/harbour/ChangeLog.txt
+++ b/harbour/ChangeLog.txt
@@ -10,6 +10,10 @@
      * Change, ! Fix, % Optimization, + Addition, - Removal, ; Comment
  */
 
+2013-01-31 22:41 UTC+0100 Przemyslaw Czerpak (druzus/at/poczta.onet.pl)
+  * harbour/src/vm/classes.c
+    ! added missing HB_STACK_TLS_PRELOAD
+
 2013-01-31 19:48 UTC+0100 Przemyslaw Czerpak (druzus/at/poczta.onet.pl)
   * harbour/include/hbapiitm.h
   * harbour/src/vm/itemapi.c
diff --git a/harbour/src/vm/classes.c b/harbour/src/vm/classes.c
index 00b239a3fa..55080a0a3a 100644
--- a/harbour/src/vm/classes.c
+++ b/harbour/src/vm/classes.c
@@ -5509,7 +5509,10 @@ void hb_clsAssociate( HB_USHORT usClassH )
    if( pSelf )
       hb_itemReturnRelease( pSelf );
    else
+   {
+      HB_STACK_TLS_PRELOAD
       hb_ret();
+   }
 }
 
 #if 0