diff --git a/include/kernels/INSBoussinesqBodyForce.h b/include/kernels/INSBoussinesqBodyForce.h
index 7d2f64b8e..838d949f1 100644
--- a/include/kernels/INSBoussinesqBodyForce.h
+++ b/include/kernels/INSBoussinesqBodyForce.h
@@ -19,7 +19,7 @@ class INSBoussinesqBodyForce : public Kernel
 protected:
   virtual Real computeQpResidual() override;
   virtual Real computeQpJacobian() override;
-  virtual Real computeQpOffDiagJacobian(unsigned jvar);
+  virtual Real computeQpOffDiagJacobian(unsigned jvar) override;
 
   // Parameters
   const VariableValue & _T;