diff --git a/dune/istl/paamg/globalaggregates.hh b/dune/istl/paamg/globalaggregates.hh
index b9d6710047d41d9310c6692460b8c5df728202d0..2b154a05d616656a046c0a2a0f5d3cecac17c969 100644
--- a/dune/istl/paamg/globalaggregates.hh
+++ b/dune/istl/paamg/globalaggregates.hh
@@ -247,5 +247,5 @@ namespace Dune
 #endif
 
 } // end Dune namespace
-  /* @} */
+  /** @} */
 #endif
diff --git a/dune/istl/schwarz.hh b/dune/istl/schwarz.hh
index b3a01c681fcfa0a8ea85ee647f77c69ea53e8ddc..5dd2f465e7b6928e6f5f97f332e1b2d3eed54593 100644
--- a/dune/istl/schwarz.hh
+++ b/dune/istl/schwarz.hh
@@ -154,8 +154,8 @@ namespace Dune {
 
   /** @} */
 
-  /*
-   * @addtogroup ISTL_Prec
+  /**
+   * \addtogroup ISTL_Prec
    * @{
    */
   //! \brief A parallel SSOR preconditioner.