diff --git a/web/includes/Monitor.php b/web/includes/Monitor.php
index a3bd1b738..e425e7f85 100644
--- a/web/includes/Monitor.php
+++ b/web/includes/Monitor.php
@@ -547,7 +547,7 @@ private $control_fields = array(
   } // end function Source
 
   public function Url() {
-    return $this->Server()->Url() .':'. ( ZM_MIN_STREAMING_PORT ? (ZM_MIN_STREAMING_PORT+$this->Id()) : $_SERVER['SERVER_PORT'] );
+    return $this->Server()->Url( ZM_MIN_STREAMING_PORT ? (ZM_MIN_STREAMING_PORT+$this->Id()) : null );
   }
 
 } // end class Monitor
diff --git a/web/includes/Server.php b/web/includes/Server.php
index 154c1744c..8b7e9f50f 100644
--- a/web/includes/Server.php
+++ b/web/includes/Server.php
@@ -38,13 +38,18 @@ class Server {
     }
   }
 
-	public function Url() {
+	public function Url( $port = null ) {
+    $url = ZM_BASE_PROTOCOL . '://';
 		if ( $this->Id() ) {
-			return ZM_BASE_PROTOCOL . '://'. $this->Hostname().$_SERVER['PHP_SELF'];
+			$url .= $this->Hostname();
 		} else {
-			return ZM_BASE_PROTOCOL . '://'. $_SERVER['SERVER_NAME'].$_SERVER['PHP_SELF'];
-			return '';
+			$url .= $_SERVER['SERVER_NAME'];
 		}
+    if ( $port ) {
+      $url .= ':'.$port;
+    }
+    $url .= $_SERVER['PHP_SELF'];
+    return $url;
 	}
 	public function Hostname() {
 		if ( isset( $this->{'Hostname'} ) and ( $this->{'Hostname'} != '' ) ) {