diff --git a/OJP_Locations.xsd b/OJP_Locations.xsd
index 9260984b6..92d0c39c6 100644
--- a/OJP_Locations.xsd
+++ b/OJP_Locations.xsd
@@ -90,6 +90,11 @@
 					<xs:documentation>Restricts the resulting location objects to the given geographical area.</xs:documentation>
 				</xs:annotation>
 			</xs:element>
+			<xs:element name="AllowedSystemId" type="xs:normalizedString" minOccurs="0" maxOccurs="unbounded">
+				<xs:annotation>
+					<xs:documentation>Used in distributed environments. e.g. EU-Spirit. If none is given, the location information request refers to all known systems (in EU-Spirit "passive servers"). If at least one is given, the location information request refers only to the given systems (in EU-Spirit "passive servers"). In EU-Spirit the system IDs were previously called "provider code". See https://eu-spirit.eu/</xs:documentation>
+				</xs:annotation>
+			</xs:element>
 		</xs:sequence>
 	</xs:complexType>
 	<xs:complexType name="PlaceParamStructure">