diff --git a/src/ifcgeom_schema_agnostic/IfcGeomRenderStyles.h b/src/ifcgeom_schema_agnostic/IfcGeomRenderStyles.h
index dc4cf8f74e..b6d57dc42d 100644
--- a/src/ifcgeom_schema_agnostic/IfcGeomRenderStyles.h
+++ b/src/ifcgeom_schema_agnostic/IfcGeomRenderStyles.h
@@ -27,6 +27,7 @@
 #include <boost/optional.hpp>
 
 #include <sstream>
+#include <memory>
 
 namespace IfcGeom {
 	class IFC_GEOM_API SurfaceStyle {