diff --git a/src/libs/ifc/schema/pattern/v0.3.1.xsd b/src/libs/ifc/schema/pattern/v0.3.1.xsd
index af3eaa1b6..6c1b41dde 100644
--- a/src/libs/ifc/schema/pattern/v0.3.1.xsd
+++ b/src/libs/ifc/schema/pattern/v0.3.1.xsd
@@ -332,7 +332,7 @@
                                                          <xs:sequence>
                                                                <xs:element name="detail" minOccurs="0" maxOccurs="unbounded">
                                                                      <xs:complexType>
-								         <xs:sequence>
+									   <xs:sequence>
                                                                                  <xs:element name="node" maxOccurs="unbounded">
                                                                                        <xs:complexType>
                                                                                              <xs:attribute name="nodeType" type="xs:string"></xs:attribute>