examples/step-37: Mark value() as override

diff --git a/tests/mpi/step-37.cc b/tests/mpi/step-37.cc
index 3f18dbbc6fa4cbb9b80ff5a63b02735d68f4cdbd..8d06ccd93e8dd565cb990550cbe1aa0d21277299 100644 (file)
--- a/tests/mpi/step-37.cc
+++ b/tests/mpi/step-37.cc
@@ -297,7 +297,7 @@ namespace Step37
     virtual ~PotentialBCFunction() = default;
 
     virtual double
-    value(const Point<dim> &p, const unsigned int) const
+    value(const Point<dim> &p, const unsigned int) const override
     {
       const double r = p.distance(x0);
       Assert(r > 0, ExcDivideByZero());