diff --git a/src/lagrangian/intermediate/particleForces/particleForces.C b/src/lagrangian/intermediate/particleForces/particleForces.C
index 3a2865d41d..3b3e1ec1e6 100644
--- a/src/lagrangian/intermediate/particleForces/particleForces.C
+++ b/src/lagrangian/intermediate/particleForces/particleForces.C
@@ -50,6 +50,24 @@ void Foam::particleForces::deleteFields()
 
 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
+Foam::particleForces::particleForces(const fvMesh& mesh)
+:
+    mesh_(mesh),
+    dict_(dictionary::null),
+    g_(vector::zero),
+    gradUPtr_(NULL),
+    HdotGradHInterPtr_(NULL),
+    gravity_(false),
+    virtualMass_(false),
+    Cvm_(0.0),
+    pressureGradient_(false),
+    paramagnetic_(false),
+    magneticSusceptibility_(0.0),
+    UName_("undefined_UName"),
+    HdotGradHName_("undefined_HdotGradHName")
+{}
+
+
 Foam::particleForces::particleForces
 (
     const fvMesh& mesh,
diff --git a/src/lagrangian/intermediate/particleForces/particleForces.H b/src/lagrangian/intermediate/particleForces/particleForces.H
index 7aacee74b3..efbba75b64 100644
--- a/src/lagrangian/intermediate/particleForces/particleForces.H
+++ b/src/lagrangian/intermediate/particleForces/particleForces.H
@@ -116,6 +116,9 @@ public:
 
     // Constructors
 
+        //- Construct null from mesh reference
+        particleForces(const fvMesh& mesh);
+
         //- Construct from mesh, dictionary and gravity
         particleForces
         (