diff --git a/src/libs/ifc/schema/individual_measurements/v0.4.0.xsd b/src/libs/ifc/schema/individual_measurements/v0.4.0.xsd
index a25d1e881..9b908798a 100644
--- a/src/libs/ifc/schema/individual_measurements/v0.4.0.xsd
+++ b/src/libs/ifc/schema/individual_measurements/v0.4.0.xsd
@@ -41,7 +41,7 @@
   </xs:element>
   <xs:simpleType name="shortName">
     <xs:restriction base="xs:string">
-      <xs:pattern value="([^\p{Nd}\p{Zs}*/&amp;|!&lt;&gt;^\-()–+−=?:;'\&quot;]){1,1}([^\p{Zs}*/&amp;|!&lt;&gt;^\-()–+−=?:;\&quot;]){0,}"/>
+      <xs:pattern value="([^\p{Nd}\p{Zs}*/&amp;|!&lt;&gt;^\-()–+−=?:;'\\&quot;]){1,1}([^\p{Zs}*/&amp;|!&lt;&gt;^\-()–+−=?:;\\&quot;]){0,}"/>
     </xs:restriction>
   </xs:simpleType>
   <xs:simpleType name="formatVersion">