diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index f25f02ce66..1ad49096e8 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -16,6 +16,12 @@
    The license applies to all entries newer than 2009-04-28.
 */
 
+2010-12-11 22:55 UTC+0200 Petr Chornyj (myorg63 at mail.ru)
+  * contrib/hblzf/hblzf.c
+    ! Fixed the algorithm used in HB_LZF_COMPRESSBOUND(), HB_LZF_COMPRESS()
+  + contrib/hblzf/tests/test2.prg
+    + added yet another simple test for HB_LZF_[DE]COMPRESS()
+
 2010-12-11 18:33 UTC+0200 Viktor Szakats (harbour.01 syenar.hu)
   * config/hbc.cfg
     + More adjustment for Harbour.
diff --git a/harbour/contrib/hblzf/hblzf.c b/harbour/contrib/hblzf/hblzf.c
index 4490089fe3..e71a253a10 100644
--- a/harbour/contrib/hblzf/hblzf.c
+++ b/harbour/contrib/hblzf/hblzf.c
@@ -62,6 +62,23 @@
 
 #include "hblzf.ch"
 
+static HB_SIZE hb_lzf_compressbound( HB_SIZE nLen )
+{
+   HB_SIZE nBuffSize = ( HB_SIZE ) ( nLen * 1.04 + 1 );
+   return ( nBuffSize >= 32 ) ? nBuffSize : 32; 
+}
+
+HB_FUNC( HB_LZF_COMPRESSBOUND )
+{
+   if( HB_ISCHAR( 1 ) || HB_ISNUM( 1 ) )
+   {
+      HB_SIZE nLen = HB_ISCHAR( 1 ) ? hb_parclen( 1 ) : ( HB_SIZE ) hb_parns( 1 );
+      hb_retns( hb_lzf_compressbound( nLen ) );
+   }
+   else
+      hb_errRT_BASE_SubstR( EG_ARG, 3012, NULL, HB_ERR_FUNCNAME, HB_ERR_ARGS_BASEPARAMS );
+}
+
 /* Return a LZF_VERSION, API version */
 HB_FUNC( HB_LZF_VERSION )
 {
@@ -78,17 +95,6 @@ HB_FUNC( HB_LZF_OPTIMIZED_FOR_SPEED )
 #endif
 }
 
-HB_FUNC( HB_LZF_COMPRESSBOUND )
-{
-   if( HB_ISCHAR( 1 ) || HB_ISNUM( 1 ) )
-   {
-      HB_SIZE nLen = HB_ISCHAR( 1 ) ? hb_parclen( 1 ) : hb_parns( 1 );
-      hb_retns( ( HB_SIZE ) ( nLen * 1.04 + 1 ) );
-   }
-   else
-      hb_errRT_BASE_SubstR( EG_ARG, 3012, NULL, HB_ERR_FUNCNAME, HB_ERR_ARGS_BASEPARAMS );
-}
-
 /* Return a string compressed with LZF */
 HB_FUNC( HB_LZF_COMPRESS )
 {
@@ -113,8 +119,8 @@ HB_FUNC( HB_LZF_COMPRESS )
          else
          {
             out_len = ( HB_ISNUM( 2 ) && hb_parns( 2 ) >= 0 ) ?
-                      hb_parns( 2 ) :
-                      ( HB_SIZE ) ( in_len * 1.04 + 1 );
+                      ( HB_SIZE ) hb_parns( 2 ) :
+                      hb_lzf_compressbound( in_len );
 
             out_data = ( char * ) hb_xalloc( out_len + 1 );
          }
diff --git a/harbour/contrib/hblzf/tests/test2.prg b/harbour/contrib/hblzf/tests/test2.prg
new file mode 100644
index 0000000000..05514348ba
--- /dev/null
+++ b/harbour/contrib/hblzf/tests/test2.prg
@@ -0,0 +1,55 @@
+/*
+ * $Id: test2.prg 14179 2010-12-08 23:34:33Z petr_ch $
+ */
+
+/* hbmk2 testz.prg -lhbbz2 -lbz2 -lhblzf -llzf -es2 -w3 */
+
+#include "simpleio.ch"
+
+#define _NREPL_     50
+
+PROCEDURE Main()
+   LOCAL cStr := Replicate( hb_memoRead( hb_argv( 0 ) ), _NREPL_ )
+   LOCAL aCompressedData := { NIL, NIL, NIL, NIL }
+   LOCAL hFuncs := { ;
+      "GZIP" => @hb_gzCompress(), ;
+      "ZLIB" => @hb_zCompress(), ;
+      "BZ2 " => @hb_bz2_compress(), ;
+      "LZF " => @hb_lzf_compress();
+      }
+   LOCAL hFuncs2 := { ;
+      "GZIP" => @hb_zUncompress(), ;
+      "ZLIB" => @hb_zUncompress(), ;
+      "BZ2 " => @hb_bz2_uncompress(), ;
+      "LZF " => @hb_lzf_decompress();
+      }
+
+   MakeTest( @hFuncs, @aCompressedData, @cStr )
+   MakeTest( @hFuncs2, @aCompressedData )
+
+   RETURN
+
+STATIC PROCEDURE MakeTest( ... )
+   LOCAL e, e2, cRes, cFmt
+   LOCAL nResult := 0
+   LOCAL nBegin, nEnd
+   LOCAL lCmp := ( PCount() > 2 )
+
+   FOR EACH e, e2 IN hb_pValue( 1 ), hb_pValue( 2 )
+      nBegin := hb_secondsCPU()
+      cRes := Eval( e:__enumValue(), iif( lCmp, hb_pValue( 3 ), e2 ), NIL, @nResult )
+      nEnd := hb_secondsCPU()
+      IF lCmp 
+         e2 := cRes
+      ENDIF
+      cFmt := hb_strFormat( ;
+         "%s: %d -> %d, Ratio %.2f%%, Times %.2f", ;
+         e:__enumKey(), ;
+         Len( IIf( lCmp, hb_pValue( 3 ), e2 ) ), Len( cRes ), ;
+         ( Len( cRes ) / Len( IIf( lCmp, hb_pValue( 3 ), e2 ) ) ) * 100, ;
+         nEnd - nBegin;
+         )
+      ? cFmt
+   NEXT
+   ?
+   RETURN