diff --git a/app/dialplans/resources/switch/conf/dialplan/470_valet_park.xml b/app/dialplans/resources/switch/conf/dialplan/470_valet_park.xml
index d54d0af3ca..12adeb3835 100644
--- a/app/dialplans/resources/switch/conf/dialplan/470_valet_park.xml
+++ b/app/dialplans/resources/switch/conf/dialplan/470_valet_park.xml
@@ -1,10 +1,10 @@
 <extension name="valet_park" number="park+*5901-*5999" context="${domain_name}" continue="false" app_uuid="3cc8363d-5ce3-48aa-8ac1-143cf297c4f7" enabled="true" order="470">
 	<condition field="destination_number" expression="^(park)?\+?\*(59(0[1-9]|[1-9][0-9]))$" break="never"/>
 	<condition field="${sip_refer_to}" expression="^.+$" break="never"/>
-	<condition field="${sip_refer_to}" expression="sip:(.*)@(.*?)(?::\d+)?\>" break="never">
-		<action application="set" data="referred_by_host=$2" inline="true"/>
+	<condition field="${sip_refer_to}" expression="(?:sip:)?@([^:]+)(?::\d+)?" break="never">
+		<action application="set" data="referred_by_host=$1" inline="true"/>
 	</condition>
-	<condition field="${sip_h_Referred-By}" expression="sip:(.*)@(.*?)(?::\d+)?\>" break="never">
+	<condition field="${sip_h_Referred-By}" expression="(?:sip:)?(\d+)(?:@.*)?\>" break="never">
 		<action application="set" data="referred_by_user=$1" inline="true"/>
 	</condition>
 	<condition field="destination_number" expression="^(park)?\+?\*(59(0[1-9]|[1-9][0-9]))$" break="never"/>