diff --git a/StarDb/AgMLGeometry/CreateGeometry.h b/StarDb/AgMLGeometry/CreateGeometry.h
index cb11f0082b6..ee7a0c580fc 100644
--- a/StarDb/AgMLGeometry/CreateGeometry.h
+++ b/StarDb/AgMLGeometry/CreateGeometry.h
@@ -1,3 +1,7 @@
+#include "StBFChain/StBFChain.h"
+
+extern StBFChain* chain;
+
 /**
  * Adapted from StarDb/VmcGeometry/CreateGeometry.h
  */