diff --git a/gtk/main.c b/gtk/main.c
index 65a7859e9..60c6931ae 100644
--- a/gtk/main.c
+++ b/gtk/main.c
@@ -138,7 +138,7 @@ static GOptionEntry linphone_options[]={
 	{
 		.long_name = "config",
 		.short_name = '\0',
-		.arg = G_OPTION_ARG_STRING,
+		.arg = G_OPTION_ARG_FILENAME,
 		.arg_data = (gpointer) &custom_config_file,
 		.description = N_("Configuration file")
 	},
diff --git a/gtk/propertybox.c b/gtk/propertybox.c
index f3179f2c9..a6cee3d48 100644
--- a/gtk/propertybox.c
+++ b/gtk/propertybox.c
@@ -678,6 +678,8 @@ void linphone_gtk_show_proxy_config(GtkWidget *pb, LinphoneProxyConfig *cfg){
 			linphone_proxy_config_get_addr(cfg));
 		tmp=linphone_proxy_config_get_route(cfg);
 		if (tmp) gtk_entry_set_text(GTK_ENTRY(linphone_gtk_get_widget(w,"route")),tmp);
+		tmp=linphone_proxy_config_get_contact_parameters(cfg);
+		if (tmp) gtk_entry_set_text(GTK_ENTRY(linphone_gtk_get_widget(w,"params")),tmp);
 		gtk_spin_button_set_value(GTK_SPIN_BUTTON(linphone_gtk_get_widget(w,"regperiod")),
 			linphone_proxy_config_get_expires(cfg));
 		gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(linphone_gtk_get_widget(w,"register")),
@@ -710,6 +712,8 @@ void linphone_gtk_proxy_ok(GtkButton *button){
 		gtk_entry_get_text(GTK_ENTRY(linphone_gtk_get_widget(w,"proxy"))));
 	linphone_proxy_config_set_route(cfg,
 		gtk_entry_get_text(GTK_ENTRY(linphone_gtk_get_widget(w,"route"))));
+	linphone_proxy_config_set_contact_parameters(cfg,
+		gtk_entry_get_text(GTK_ENTRY(linphone_gtk_get_widget(w,"params"))));
 	linphone_proxy_config_expires(cfg,
 		(int)gtk_spin_button_get_value(
 			GTK_SPIN_BUTTON(linphone_gtk_get_widget(w,"regperiod"))));
diff --git a/gtk/sip_account.ui b/gtk/sip_account.ui
index 60b751cfa..9c23c806d 100644
--- a/gtk/sip_account.ui
+++ b/gtk/sip_account.ui
@@ -91,7 +91,7 @@
                         <property name="visible">True</property>
                         <property name="can_focus">False</property>
                         <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
-                        <property name="n_rows">4</property>
+                        <property name="n_rows">5</property>
                         <property name="n_columns">2</property>
                         <child>
                           <object class="GtkLabel" id="label38">
@@ -193,7 +193,7 @@
                           <object class="GtkSpinButton" id="regperiod">
                             <property name="visible">True</property>
                             <property name="can_focus">True</property>
-                            <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
+			    <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
                             <property name="primary_icon_activatable">False</property>
                             <property name="secondary_icon_activatable">False</property>
                             <property name="adjustment">adjustment1</property>
@@ -205,6 +205,38 @@
                             <property name="bottom_attach">4</property>
                           </packing>
                         </child>
+                        <child>
+                          <object class="GtkLabel" id="contactParams">
+                            <property name="visible">True</property>
+                            <property name="can_focus">False</property>
+                            <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
+                            <property name="label" translatable="yes">Contact params:</property>
+                            <property name="justify">right</property>
+                          </object>
+                          <packing>
+                            <property name="top_attach">4</property>
+                            <property name="bottom_attach">5</property>
+                          </packing>
+                        </child>
+                        <child>
+                          <object class="GtkEntry" id="params">
+                            <property name="width_request">275</property>
+                            <property name="visible">True</property>
+                            <property name="can_focus">True</property>
+                            <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
+                            <property name="invisible_char">•</property>
+                            <property name="invisible_char_set">True</property>
+                            <property name="primary_icon_activatable">False</property>
+                            <property name="secondary_icon_activatable">False</property>
+                          </object>
+                          <packing>
+                            <property name="left_attach">1</property>
+                            <property name="right_attach">2</property>
+                            <property name="top_attach">4</property>
+                            <property name="bottom_attach">5</property>
+                          </packing>
+                        </child>
+
                       </object>
                       <packing>
                         <property name="expand">True</property>