diff --git a/src/ifcconvert/OpenCascadeBasedSerializer.cpp b/src/ifcconvert/OpenCascadeBasedSerializer.cpp
index adbc218049..7aead0f50a 100644
--- a/src/ifcconvert/OpenCascadeBasedSerializer.cpp
+++ b/src/ifcconvert/OpenCascadeBasedSerializer.cpp
@@ -24,6 +24,8 @@
 #include <BRepBuilderAPI_GTransform.hxx>
 #include <BRepBuilderAPI_Transform.hxx>
 
+#include <Standard_Version.hxx>
+
 #include "OpenCascadeBasedSerializer.h"
 
 bool OpenCascadeBasedSerializer::ready() {
diff --git a/src/ifcgeom/IfcGeomShapes.cpp b/src/ifcgeom/IfcGeomShapes.cpp
index ba2ff2c66f..3127d451a4 100644
--- a/src/ifcgeom/IfcGeomShapes.cpp
+++ b/src/ifcgeom/IfcGeomShapes.cpp
@@ -93,6 +93,8 @@
 #include <BRepCheck_Analyzer.hxx>
 #include <BRepClass3d_SolidClassifier.hxx>
 
+#include <Standard_Version.hxx>
+
 #include "../ifcgeom/IfcGeom.h"
 
 bool IfcGeom::Kernel::convert(const IfcSchema::IfcExtrudedAreaSolid* l, TopoDS_Shape& shape) {