diff --git a/dune/gfe/unitvector.hh b/dune/gfe/unitvector.hh
index 17116adcc1ddf65b802cafaa96e5189bd09fcafd..f2614df4bf15308a22580297f233e042e74d90f1 100644
--- a/dune/gfe/unitvector.hh
+++ b/dune/gfe/unitvector.hh
@@ -223,7 +223,7 @@ public:
     }
     
     
-    /** \brief Compute the mixed third derivative \partial d^3 / \partial da db^2
+    /** \brief Compute the third derivative \partial d^3 / \partial da db^2
 
     Unlike the distance itself the squared distance is differentiable at zero
      */