diff --git a/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.H b/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.H
index c1774af49b..8b31dc953d 100644
--- a/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.H
+++ b/src/OpenFOAM/primitives/functions/Function1/Function1/Function1.H
@@ -202,6 +202,9 @@ public:
 
         // Evaluation
 
+            using Function1Type::value;
+            using Function1Type::integrate;
+
             //- Return value as a function of (scalar) independent variable
             virtual tmp<Field<Type>> value(const scalarField& x) const;