diff --git a/src/common/messages.rs b/src/common/messages.rs
index 9b62b12d..b3dac443 100644
--- a/src/common/messages.rs
+++ b/src/common/messages.rs
@@ -21,12 +21,12 @@ pub const DELETE_PORT_MAPPING_HEADER: &'static str =
 
 pub fn format_get_external_ip_message() -> String {
     format!(r#"<?xml version="1.0"?>
-<SOAP-ENV:Envelope SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
-    <SOAP-ENV:Body>
+<s:Envelope s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
+    <s:Body>
         <m:GetExternalIPAddress xmlns:m="urn:schemas-upnp-org:service:WANIPConnection:1">
         </m:GetExternalIPAddress>
-    </SOAP-ENV:Body>
-</SOAP-ENV:Envelope>"#)
+    </s:Body>
+</s:Envelope>"#)
 }
 
 pub fn format_add_any_port_mapping_message(