diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index 12466a5fc9..39e650b4e8 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -17,6 +17,10 @@
    past entries belonging to author(s): Viktor Szakats.
 */
 
+2009-12-11 20:25 UTC+0100 Viktor Szakats (harbour.01 syenar.hu)
+  * contrib/hbwin/win_regc.c
+    ! WIN_REGSETVALUEEX(): Off by one bug fixed in prev commit.
+
 2009-12-11 20:16 UTC+0100 Viktor Szakats (harbour.01 syenar.hu)
   * contrib/hbwin/wapi_winbase.c
     * Eliminated hb_parclen() call in WAPI_FORMATMESSAGE() function.
diff --git a/harbour/contrib/hbwin/win_regc.c b/harbour/contrib/hbwin/win_regc.c
index e47aa13fea..da0fc66fc5 100644
--- a/harbour/contrib/hbwin/win_regc.c
+++ b/harbour/contrib/hbwin/win_regc.c
@@ -204,6 +204,8 @@ HB_FUNC( WIN_REGSETVALUEEX )
       HB_SIZE nValueLen;
       LPCTSTR lpValue = HB_PARSTR( 5, &hValue, &nValueLen );
 
+      ++nValueLen;
+
       #if defined( UNICODE )
           nValueLen *= 2;
       #endif
@@ -213,7 +215,7 @@ HB_FUNC( WIN_REGSETVALUEEX )
                               0,
                               dwType,
                               ( const BYTE * ) lpValue,
-                              ( DWORD ) nValueLen + 1 ) == ERROR_SUCCESS );
+                              ( DWORD ) nValueLen ) == ERROR_SUCCESS );
 
       hb_strfree( hValue );
    }