diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index 8c774f903e..65a82527e4 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -8,6 +8,13 @@
    2008-12-31 13:59 UTC+0100 Foo Bar <foo.bar@foobar.org>
 */
 
+2008-04-28 09:28 UTC+0100 Viktor Szakats (harbour.01 syenar hu)
+   * common.mak
+   * source/rtl/Makefile
+   * source/rtl/einstvar.prg
+   + source/rtl/einstvau.prg
+     * Undoc function moved to separate file.
+
 2008-04-28 01:00 UTC+0100 Viktor Szakats (harbour.01 syenar hu)
    * contrib/rdd_ads/adsfunc.c
      ! Fixed warning in ADSDIRECTORY() for ADS >= 9.00.
diff --git a/harbour/common.mak b/harbour/common.mak
index 352f1e1ab2..a5e1594e65 100644
--- a/harbour/common.mak
+++ b/harbour/common.mak
@@ -599,6 +599,7 @@ RTL_LIB_OBJS = \
     $(OBJ_DIR)\dircmd$(OBJEXT)   \
     $(OBJ_DIR)\einstv52$(OBJEXT) \
     $(OBJ_DIR)\einstvar$(OBJEXT) \
+    $(OBJ_DIR)\einstvau$(OBJEXT) \
     $(OBJ_DIR)\errorsys$(OBJEXT) \
     $(OBJ_DIR)\fieldbl$(OBJEXT)  \
     $(OBJ_DIR)\getlist$(OBJEXT)  \
diff --git a/harbour/source/rtl/Makefile b/harbour/source/rtl/Makefile
index d775313ff0..063916c56c 100644
--- a/harbour/source/rtl/Makefile
+++ b/harbour/source/rtl/Makefile
@@ -170,6 +170,7 @@ PRG_SOURCES=\
 	dircmd.prg   \
 	einstv52.prg \
 	einstvar.prg \
+	einstvau.prg \
 	errorsys.prg \
 	fieldbl.prg  \
 	getlist.prg  \
diff --git a/harbour/source/rtl/einstvar.prg b/harbour/source/rtl/einstvar.prg
index 7ff4ed90d4..612a05cc88 100644
--- a/harbour/source/rtl/einstvar.prg
+++ b/harbour/source/rtl/einstvar.prg
@@ -53,17 +53,6 @@
 
 #include "common.ch"
 
-#ifdef HB_C52_UNDOC
-
-FUNCTION _eInstVar( ... )
-#ifdef HB_COMPAT_C53
-   RETURN __eInstVar53( ... )
-#else
-   RETURN __eInstVar52( ... )
-#endif
-
-#endif
-
 /* NOTE: In CA-Cl*pper 5.2/5.3 the cMethod argument seems to be ignored. */
 
 FUNCTION __eInstVar53( oVar, cMethod, xValue, cType, nSubCode, bValid )
diff --git a/harbour/source/rtl/einstvau.prg b/harbour/source/rtl/einstvau.prg
new file mode 100644
index 0000000000..334a1da0ce
--- /dev/null
+++ b/harbour/source/rtl/einstvau.prg
@@ -0,0 +1,63 @@
+/*
+ * $Id$
+ */
+
+/*
+ * Harbour Project source code:
+ *    Undocumented CA-Cl*pper function used to validate
+ *    instance variable type in assign messages.
+ *
+ * Copyright 2007 Przemyslaw Czerpak <druzus / at / priv.onet.pl>
+ * www - http://www.harbour-project.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * 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.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this software; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
+ *
+ * As a special exception, the Harbour Project gives permission for
+ * additional uses of the text contained in its release of Harbour.
+ *
+ * The exception is that, if you link the Harbour libraries with other
+ * files to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the Harbour library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the Harbour
+ * Project under the name Harbour.  If you copy code from other
+ * Harbour Project or Free Software Foundation releases into a copy of
+ * Harbour, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way.  To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for Harbour, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice.
+ *
+ */
+
+#ifdef HB_C52_UNDOC
+
+FUNCTION _eInstVar( ... )
+#ifdef HB_COMPAT_C53
+   RETURN __eInstVar53( ... )
+#else
+   RETURN __eInstVar52( ... )
+#endif
+
+#endif