diff --git a/data/xsd/additional_file.xsd b/data/xsd/additional_file.xsd
index 9747e355f016..ed2776dd09ca 100644
--- a/data/xsd/additional_file.xsd
+++ b/data/xsd/additional_file.xsd
@@ -247,6 +247,7 @@
         <xsd:attribute name="edgesFile" type="xsd:string" use="optional"/>
         <xsd:attribute name="aggregate" type="boolType" use="optional"/>
         <xsd:attribute name="minSamples" type="nonNegativeFloatType" use="optional"/>
+        <xsd:attribute name="speedThreshold" type="floatType" use="optional"/>
     </xsd:complexType>
 
     <xsd:complexType name="timedEventType">