diff --git a/data/schema/scene.xsd b/data/schema/scene.xsd
index 4218f5bf..3d2c36ba 100644
--- a/data/schema/scene.xsd
+++ b/data/schema/scene.xsd
@@ -197,6 +197,7 @@
 			<xsd:extension base="objectBase">
 				<xsd:choice minOccurs="0" maxOccurs="unbounded">
 					<xsd:group ref="objectGroup"/>
+					<xsd:element name="phase" type="phase"/>
 				</xsd:choice>
 			</xsd:extension>
 		</xsd:complexContent>