diff --git a/src/OpenFOAM/primitives/functions/Function1/CSV/CSV.H b/src/OpenFOAM/primitives/functions/Function1/CSV/CSV.H
index 19d93e036f373518533e94824c5331e3517cfaeb..82fc5c9e059ae054643622fde6173439d3d8753f 100644
--- a/src/OpenFOAM/primitives/functions/Function1/CSV/CSV.H
+++ b/src/OpenFOAM/primitives/functions/Function1/CSV/CSV.H
@@ -151,6 +151,14 @@ public:
 };
 
 
+// Template specialisations
+template<>
+label CSV<label>::readValue(const List<string>& splitted) const;
+
+template<>
+Foam::scalar CSV<scalar>::readValue(const List<string>& splitted) const;
+
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 } // End namespace Function1Types