diff --git a/MeshLib/VtkOGSEnum.cpp b/MeshLib/VtkOGSEnum.cpp
index d92df57d705598b5ea9b4da6ffb88665f9c617ad..03fd551dd270b84ea8ef957c3cf2bb645b1a9e6f 100644
--- a/MeshLib/VtkOGSEnum.cpp
+++ b/MeshLib/VtkOGSEnum.cpp
@@ -92,6 +92,8 @@ int OGSToVtkCellType(CellType ogs)
 			return VTK_PYRAMID;
 		case CellType::PYRAMID13:
 			return VTK_QUADRATIC_PYRAMID;
+		case CellType::INVALID:
+			return -1;
 		default:
 			return -1;
 	}