diff --git a/corsika/framework/process/NullModel.hpp b/corsika/framework/process/NullModel.hpp
index eb39f870e38c26796fdcc601e601f4327ee2bdb5..cdaa3753e0369574eb067e218096613f4c3a3c5d 100644
--- a/corsika/framework/process/NullModel.hpp
+++ b/corsika/framework/process/NullModel.hpp
@@ -18,7 +18,7 @@ namespace corsika {
      @{
 
      Process that does nothing. It is not even derived from
-     BaseProcess
+     BaseProcess. But it can be added to a ProcessSequence.
    */
 
   class NullModel {
@@ -30,7 +30,7 @@ namespace corsika {
     static bool const is_process_sequence = false;
     static bool const is_switch_process_sequence = false;
 
-    //! Default number of processes is just one, obviously
+    //! Default number of processes is zero, obviously
     static unsigned int constexpr getNumberOfProcesses() { return 0; }
   };
 
diff --git a/corsika/framework/utility/COMBoost.hpp b/corsika/framework/utility/COMBoost.hpp
index 43a123cf18fa62fe62baded114b319525b856d55..eac8dde53f3eadc461e26c559e8b8ed36463b647 100644
--- a/corsika/framework/utility/COMBoost.hpp
+++ b/corsika/framework/utility/COMBoost.hpp
@@ -25,7 +25,7 @@ namespace corsika {
    **/
 
   /**
-     @class
+     @class COMBoost
      @ingroup Utilities
 
      This utility class handles Lorentz boost between different
diff --git a/corsika/framework/utility/SaveBoostHistogram.hpp b/corsika/framework/utility/SaveBoostHistogram.hpp
index 30cbdda2a6c9e95ce63dbfbaf7c7a120d4bbe727..16e39180c01668ac0f83694f77fb84ed010dd49d 100644
--- a/corsika/framework/utility/SaveBoostHistogram.hpp
+++ b/corsika/framework/utility/SaveBoostHistogram.hpp
@@ -13,6 +13,7 @@
 namespace corsika {
 
   /**
+   * @file SaveBoostHistogram.hpp
    * @ingroup Utilities
    *
    * This functions saves a boost::histogram into a numpy file. Only rather basic axis