diff --git a/doc/gmsh.html b/doc/gmsh.html
index ee58c8967a63832e79d9f373a46924e9727bc63b..df3ce65d73a4a976d4f0a6f0f042cc2eed283570 100644
--- a/doc/gmsh.html
+++ b/doc/gmsh.html
@@ -283,7 +283,7 @@ href="/gl2ps/">GL2PS</a>.
 <input type="hidden" name="no_note" value="1">
 <input type="hidden" name="currency_code" value="USD">
 <input type="hidden" name="tax" value="0">
-<input type="image" src="/images/donation.gif" border="0" name="submit" 
+<input type="image" src="/images/donation.gif" name="submit" 
        alt="Make a donation with PayPal">
 </form>