diff --git a/xsd/siri_model/siri_situationActions.xsd b/xsd/siri_model/siri_situationActions.xsd
index 7b54093..0c18438 100644
--- a/xsd/siri_model/siri_situationActions.xsd
+++ b/xsd/siri_model/siri_situationActions.xsd
@@ -229,7 +229,7 @@ Rail transport, Roads and road transport
 				</xsd:annotation>
 				<xsd:complexType>
 					<xsd:sequence>
-						<xsd:element name="ScopeType" type="ScopeTypeEnumeration"/>
+						<xsd:element name="ScopeType" type="ScopeTypeEnumeration" minOccurs="0"/>
 						<xsd:element name="Affects" type="AffectsScopeStructure"/>
 					</xsd:sequence>
 				</xsd:complexType>
@@ -619,7 +619,7 @@ Rail transport, Roads and road transport
 				</xsd:annotation>
 				<xsd:complexType>
 					<xsd:sequence>
-						<xsd:element name="ScopeType" type="ScopeTypeEnumeration"/>
+						<xsd:element name="ScopeType" type="ScopeTypeEnumeration" minOccurs="0"/>
 						<xsd:element name="Affects" type="AffectsScopeStructure"/>
 					</xsd:sequence>
 				</xsd:complexType>