diff --git a/dune/gfe/unitvector.hh b/dune/gfe/unitvector.hh
index 63c160e98e3d6c233f364516f2d5f0bbfa04587e..c3698ee5cd79807bd6865d4108b1912c3ef29d77 100644
--- a/dune/gfe/unitvector.hh
+++ b/dune/gfe/unitvector.hh
@@ -223,7 +223,7 @@ public:
     }
     
     
-    /** \brief Compute the third derivative \partial d^3 / \partial da db^2
+    /** \brief Compute the third derivative \partial d^3 / \partial dq^3
 
     Unlike the distance itself the squared distance is differentiable at zero
      */