diff --git a/ProcessLib/CentralDifferencesJacobianAssembler.h b/ProcessLib/CentralDifferencesJacobianAssembler.h
index 04754347df612e2e140f13e9a229e4a0d5c1c236..4c59e00fbc09cc153d45223d84e01b71aace8be6 100644
--- a/ProcessLib/CentralDifferencesJacobianAssembler.h
+++ b/ProcessLib/CentralDifferencesJacobianAssembler.h
@@ -20,7 +20,8 @@ class ConfigTree;
 namespace ProcessLib
 {
 //! Assembles the Jacobian matrix using central differences.
-class CentralDifferencesJacobianAssembler : public AbstractJacobianAssembler
+class CentralDifferencesJacobianAssembler final
+    : public AbstractJacobianAssembler
 {
 public:
     //! Constructs a new instance.