diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index 8a346b09fc..2a20e2df90 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -16,6 +16,18 @@
    The license applies to all entries newer than 2009-04-28.
 */
 
+2011-09-24 11:10 UTC+0200 Przemyslaw Czerpak (druzus/at/priv.onet.pl)
+  * harbour/include/hbtrace.h
+  * harbour/src/common/hbtrace.c
+    + added new C function:
+         const char * hb_tracemode( const char * szNewMode );
+      it can be called with "a" or "w" parameter to set open
+      mode for newly created by hb_tracefile() log files.
+
+  * harbour/src/rtl/trace.c
+    + added new PRG function:
+         HB_TRACEMODE( [<cNewMode>] ) -> <cPrevMode>
+
 2011-09-23 18:36 UTC+0200 Przemyslaw Czerpak (druzus/at/priv.onet.pl)
   * harbour/src/rtl/hbrandom.c
     ! fixed HB_RANDOMINTMAX() to return correct value for new PRNG
diff --git a/harbour/include/hbtrace.h b/harbour/include/hbtrace.h
index 41c66a61b4..650cac0dec 100644
--- a/harbour/include/hbtrace.h
+++ b/harbour/include/hbtrace.h
@@ -222,6 +222,7 @@ extern HB_EXPORT int       hb_tracestate( int new_state );
 extern HB_EXPORT int       hb_tracelevel( int new_level );
 extern HB_EXPORT int       hb_traceflush( int new_flush );
 extern HB_EXPORT int       hb_tracesysout( int new_sysout );
+extern HB_EXPORT const char * hb_tracemode( const char * szNewMode );
 extern HB_EXPORT HB_BOOL   hb_tracefile( const char * szFile );
 
 extern HB_EXPORT void      hb_tracelog( int level, const char * file, int line, const char * proc, const char * fmt, ... ) HB_PRINTF_FORMAT( 5, 6 );
diff --git a/harbour/src/common/hbtrace.c b/harbour/src/common/hbtrace.c
index 9badc0f52e..80c9102d56 100644
--- a/harbour/src/common/hbtrace.c
+++ b/harbour/src/common/hbtrace.c
@@ -82,6 +82,7 @@ static int s_enabled = 1;
 static int s_level   = -1;
 static int s_flush   = -1;
 static int s_sysout  = -1;
+static const char * s_mode = "w";
 
 static FILE * s_fp = NULL;
 
@@ -117,11 +118,28 @@ int hb_tracelevel( int new_level )
    return old_level;
 }
 
+const char * hb_tracemode( const char * szNewMode )
+{
+   const char * szPrevMode = s_mode;
+
+   if( szNewMode ) switch( *szNewMode )
+   {
+      case 'a':
+         s_mode = "a";
+         break;
+      case 'w':
+         s_mode = "w";
+         break;
+   }
+
+   return szPrevMode;
+}
+
 HB_BOOL hb_tracefile( const char * szFile )
 {
    if( szFile && *szFile )
    {
-      FILE * fp = hb_fopen( szFile, "w" );
+      FILE * fp = hb_fopen( szFile, s_mode );
 
       if( fp )
       {
@@ -176,7 +194,7 @@ int hb_tr_level( void )
          if( hb_getenv_buffer( "HB_TR_OUTPUT", env, sizeof( env ) ) &&
              env[ 0 ] != '\0' )
          {
-            s_fp = hb_fopen( env, "w" );
+            s_fp = hb_fopen( env, s_mode );
 
             if( s_fp == NULL )
                s_fp = stderr;
diff --git a/harbour/src/rtl/trace.c b/harbour/src/rtl/trace.c
index dedefefbee..3cf3411bd2 100644
--- a/harbour/src/rtl/trace.c
+++ b/harbour/src/rtl/trace.c
@@ -103,6 +103,11 @@ HB_FUNC( HB_TRACEFLUSH )
                                            hb_parnidef( 1, -1 ) ) );
 }
 
+HB_FUNC( HB_TRACEMODE )
+{
+   hb_retc( hb_tracemode( hb_parc( 1 ) ) );
+}
+
 HB_FUNC( HB_TRACEFILE )
 {
    hb_retl( hb_tracefile( hb_parc( 1 ) ) );