diff --git a/src/ifcgeom_schema_agnostic/IfcGeomMaterial.h b/src/ifcgeom_schema_agnostic/IfcGeomMaterial.h
index 531be4ef46..3ae3260619 100644
--- a/src/ifcgeom_schema_agnostic/IfcGeomMaterial.h
+++ b/src/ifcgeom_schema_agnostic/IfcGeomMaterial.h
@@ -21,6 +21,7 @@
 #define IFCGEOMMATERIAL_H
 
 #include <string>
+#include <memory>
 
 #include "../ifcgeom_schema_agnostic/IfcGeomRenderStyles.h"