diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index 2a09aee470..ca886d01e0 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -16,6 +16,16 @@
    The license applies to all entries newer than 2009-04-28.
 */
 
+2011-01-15 16:34 UTC+0100 Viktor Szakats (harbour.01 syenar.hu)
+  * bin/hb3rdpat.hbs
+    + Added error message when URL is missing.
+    ; TOFIX: I could not test it because of this error:
+             'E: Can not find xz'
+             I indeed don't have it, but this tool is not needed
+             for this diffing session, so IMO it should be left
+             out when checking for prerequisites.
+             Tamas, can you take a look?
+
 2011-01-15 13:47 UTC+0100 Przemyslaw Czerpak (druzus/at/priv.onet.pl)
   * harbour/contrib/hbmxml/hbmxml.c
     ! fixed using released strings
@@ -38,7 +48,7 @@
          such platforms and needs a lot of modifications to adopt it
          to such condition. I do not expect that anyone will try to
          make such port in the future.
-    ; QUESTION: why custom_save_cb() uses hb_parc() instead of 
+    ; QUESTION: why custom_save_cb() uses hb_parc() instead of
                 hb_parstr_utf8()?
     ; QUESTION2: what TODO in MXMLDELETE() means?
 
diff --git a/harbour/bin/hb3rdpat.hbs b/harbour/bin/hb3rdpat.hbs
index ff2f3cc749..1c53a9ae3a 100755
--- a/harbour/bin/hb3rdpat.hbs
+++ b/harbour/bin/hb3rdpat.hbs
@@ -670,6 +670,11 @@ STATIC FUNCTION FetchAndExtract( cArchiveURL )
       }                                                                                   ;
    }
 
+   IF Empty( cArchiveURL )
+      OutStd( "E: URL missing" + hb_eol() )
+      RETURN .F.
+   ENDIF
+
    cFileName := URL_GetFileName( cArchiveURL )
 
    FOR EACH cPattern IN hb_HKeys( aActionMap )