diff --git a/abonapp/templates/abonapp/editAbon.html b/abonapp/templates/abonapp/editAbon.html
index a5c2698..8324b9b 100644
--- a/abonapp/templates/abonapp/editAbon.html
+++ b/abonapp/templates/abonapp/editAbon.html
@@ -31,7 +31,7 @@
                                 <div class="input-group input-group-sm">
                                     {{ form.telephone }}{{ form.telephone.errors }}
                                     <span class="input-group-btn">
-                                        <a href="tel:{{ form.telephone.value }}" class="btn btn-default">
+                                        <a href="sip:{{ form.telephone.value }}" class="btn btn-default">
                                             <span class="glyphicon glyphicon-earphone"></span>
                                         </a>
                                     </span>