diff --git a/src/thermophysicalModels/basicSolidThermo/isotropicKSolidThermo/isotropicKSolidThermo.H b/src/thermophysicalModels/basicSolidThermo/isotropicKSolidThermo/isotropicKSolidThermo.H
index e40f4d06c9f592ca8f7b7a7e37f3adbb7a425ab8..728ccca0c35192c5cfb618856b794602b797c1d9 100644
--- a/src/thermophysicalModels/basicSolidThermo/isotropicKSolidThermo/isotropicKSolidThermo.H
+++ b/src/thermophysicalModels/basicSolidThermo/isotropicKSolidThermo/isotropicKSolidThermo.H
@@ -109,7 +109,7 @@ public:
             {
                 notImplemented
                 (
-                    "directionalKSolidThermo::directionalKappa(const label)
+                    "directionalKSolidThermo::directionalKappa(const label)"
                     "const"
                 );
                 return tmp<symmTensorField>(NULL);