diff --git a/examples/freeflowchannel/problem.hh b/examples/freeflowchannel/problem.hh
index c916a96bd0f1a13ff3281b2453d2a334c0d11171..f651909392e3cdee4ce8c971d8f7f2fc8c1ef265 100644
--- a/examples/freeflowchannel/problem.hh
+++ b/examples/freeflowchannel/problem.hh
@@ -190,12 +190,6 @@ public:
     Scalar temperature() const
     { return 273.15 + 10; } // 10°C
 
-    // We need to define that there are no sources or sinks.
-    NumEqVector sourceAtPos(const GlobalPosition &globalPos) const
-    {
-        return NumEqVector(0.0);
-    }
-
 private:
 
     // The inlet is at the left side of the physical domain.