diff --git a/dumux/material/constants.hh b/dumux/material/constants.hh
index c28bebc1023bbaa0ca2cc593af12acfc8cee3545..a5510e2bbc46fc96a482d464d25ab69e778c8b6e 100644
--- a/dumux/material/constants.hh
+++ b/dumux/material/constants.hh
@@ -18,7 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
- *
+ * \ingroup Material
  * \brief A central place for various physical constants occuring in
  *        some equations.
  */
@@ -31,6 +31,7 @@ namespace Dumux
 {
 
 /*!
+ * \ingroup Material
  * \brief A central place for various physical constants occuring in
  *        some equations.
  */
diff --git a/dumux/material/fluidmatrixinteractions/2pia/awnsurfaceexpfct.hh b/dumux/material/fluidmatrixinteractions/2pia/awnsurfaceexpfct.hh
index 829b922476ff2fb6edb36eddbb23f3e42323e111..0658e36d3c597d684421eaa430933b4a7983966b 100644
--- a/dumux/material/fluidmatrixinteractions/2pia/awnsurfaceexpfct.hh
+++ b/dumux/material/fluidmatrixinteractions/2pia/awnsurfaceexpfct.hh
@@ -16,7 +16,7 @@
  *****************************************************************************/
 /*!
  * \file
- * \ingroup fluidmatrixinteractionsparams
+ * \ingroup fluidmatrixinteractionslaws
  * \brief Specification of a function relating volume specific interfacial area to capillary pressure and saturation.
  * This function is exponential.
  */
@@ -105,5 +105,3 @@ public:
 } // namespace Dumux
 
 #endif
-
-
diff --git a/dumux/material/idealgas.hh b/dumux/material/idealgas.hh
index a713b01907aa57d9866ca4cf91ad93729646817a..b2f2c92a3edee69958881d9320307b51599093ec 100644
--- a/dumux/material/idealgas.hh
+++ b/dumux/material/idealgas.hh
@@ -18,7 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
- *
+ * \ingroup Material
  * \brief Relations valid for an ideal gas.
  */
 #ifndef DUMUX_IDEAL_GAS_HH
@@ -30,6 +30,7 @@ namespace Dumux
 {
 
 /*!
+ * \ingroup Material
  * \brief Relations valid for an ideal gas.
  */
 template <class Scalar>