diff --git a/src/OpenFOAM/fields/Fields/Field/Field.C b/src/OpenFOAM/fields/Fields/Field/Field.C
index 334eba8e41..7460dba215 100644
--- a/src/OpenFOAM/fields/Fields/Field/Field.C
+++ b/src/OpenFOAM/fields/Fields/Field/Field.C
@@ -677,6 +677,7 @@ template<class Type>
 template<class Form, class Cmpt, int nCmpt>
 void Foam::Field<Type>::operator=(const VectorSpace<Form,Cmpt,nCmpt>& vs)
 {
+    typedef VectorSpace<Form,Cmpt,nCmpt> VSType;
     TFOR_ALL_F_OP_S(Type, *this, =, VSType, vs)
 }