diff --git a/SimDataFormats/ValidationFormats/BuildFile.xml b/SimDataFormats/ValidationFormats/BuildFile.xml
index bc0d3c8273205..7fc61024ce4ff 100644
--- a/SimDataFormats/ValidationFormats/BuildFile.xml
+++ b/SimDataFormats/ValidationFormats/BuildFile.xml
@@ -1,5 +1,6 @@
 <use name="DataFormats/Common"/>
 <use name="DataFormats/GeometryVector"/>
+<use name="DataFormats/Math"/>
 <use name="clhep"/>
 <use name="geant4core"/>
 <use name="expat"/>