diff --git a/src/paraview-plugins/vtkPVFoam/vtkPVFoam.C b/src/paraview-plugins/vtkPVFoam/vtkPVFoam.C
index 7603478537480fb4719de5c16af17281a76b4f90..2e6850c57b940378ff375ab8eaaab444bd78054f 100644
--- a/src/paraview-plugins/vtkPVFoam/vtkPVFoam.C
+++ b/src/paraview-plugins/vtkPVFoam/vtkPVFoam.C
@@ -30,6 +30,7 @@ License
 #include "areaFaMesh.H"
 #include "faMesh.H"
 #include "fvMesh.H"
+#include "foamVersion.H"
 #include "Time.H"
 #include "patchZones.H"
 #include "IOobjectList.H"
@@ -314,6 +315,9 @@ Foam::vtkPVFoam::vtkPVFoam
         fullCasePath = cwd();
     }
 
+    // OPENFOAM API
+    setEnv("FOAM_API", std::to_string(foamVersion::api), true);
+
     // The name of the executable, unless already present in the environment
     setEnv("FOAM_EXECUTABLE", "paraview", false);
 
diff --git a/src/paraview-plugins/vtkPVblockMesh/vtkPVblockMesh.C b/src/paraview-plugins/vtkPVblockMesh/vtkPVblockMesh.C
index 6a9037c38540e54f51f46a3ed603652210c35b1e..efec807d266af56655fd4865ace86adefa4e5817 100644
--- a/src/paraview-plugins/vtkPVblockMesh/vtkPVblockMesh.C
+++ b/src/paraview-plugins/vtkPVblockMesh/vtkPVblockMesh.C
@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
-     \\/     M anipulation  | Copyright (C) 2017 OpenCFD Ltd.
+     \\/     M anipulation  | Copyright (C) 2017-2019 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -29,6 +29,7 @@ License
 // OpenFOAM includes
 #include "blockMesh.H"
 #include "blockMeshTools.H"
+#include "foamVersion.H"
 #include "Time.H"
 #include "patchZones.H"
 #include "StringStream.H"
@@ -206,6 +207,9 @@ Foam::vtkPVblockMesh::vtkPVblockMesh
         fullCasePath = cwd();
     }
 
+    // OPENFOAM API
+    setEnv("FOAM_API", std::to_string(foamVersion::api), true);
+
     // The name of the executable, unless already present in the environment
     setEnv("FOAM_EXECUTABLE", "paraview", false);