diff --git a/src/OpenFOAM/fields/Fields/triadField/triadField.H b/src/OpenFOAM/fields/Fields/triadField/triadField.H
index 53ba1f37d3..bdddd47add 100644
--- a/src/OpenFOAM/fields/Fields/triadField/triadField.H
+++ b/src/OpenFOAM/fields/Fields/triadField/triadField.H
@@ -35,25 +35,12 @@ SourceFiles
 #ifndef triadField_H
 #define triadField_H
 
+#include "triadFieldFwd.H"
 #include "Field.H"
-#include "triad.H"
 
 #define TEMPLATE
 #include "FieldFunctionsM.H"
 
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-namespace Foam
-{
-
-typedef Field<triad> triadField;
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-} // End namespace Foam
-
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
 #include "undefFieldFunctionsM.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
diff --git a/src/OpenFOAM/fields/Fields/triadField/triadFieldFwd.H b/src/OpenFOAM/fields/Fields/triadField/triadFieldFwd.H
new file mode 100644
index 0000000000..74cf564c53
--- /dev/null
+++ b/src/OpenFOAM/fields/Fields/triadField/triadFieldFwd.H
@@ -0,0 +1,58 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | Copyright (C) 2017 OpenCFD Ltd.
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Typedef
+    Foam::triadField
+
+Description
+    Forward declarations of the specialisation of Field\<T\> for triad.
+
+SourceFiles
+    triadField.C
+
+\*---------------------------------------------------------------------------*/
+
+#ifndef triadFieldFwd_H
+#define triadFieldFwd_H
+
+#include "triad.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+template<class Type> class Field;
+typedef Field<triad> triadField;
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+} // End namespace Foam
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#endif
+
+// ************************************************************************* //