diff --git a/coreapi/linphonecore.c b/coreapi/linphonecore.c
index 6741073b1..870512454 100644
--- a/coreapi/linphonecore.c
+++ b/coreapi/linphonecore.c
@@ -2297,6 +2297,8 @@ LinphoneAddress * linphone_core_interpret_url(LinphoneCore *lc, const char *url)
 	LinphoneProxyConfig *proxy=lc->default_proxy;
 	char *tmpurl;
 	LinphoneAddress *uri;
+	
+	if (*url=='\0') return NULL;
 
 	if (is_enum(url,&enum_domain)){
 		if (lc->vtable.display_status!=NULL)
diff --git a/gtk/parameters.ui b/gtk/parameters.ui
index 21464d9e4..5f42cf9c5 100644
--- a/gtk/parameters.ui
+++ b/gtk/parameters.ui
@@ -48,7 +48,6 @@
     <property name="page_increment">10</property>
   </object>
   <object class="GtkAdjustment" id="adjustment7">
-    <property name="lower">1</property>
     <property name="upper">65535</property>
     <property name="value">5060</property>
     <property name="step_increment">1</property>