diff --git a/Base/Vector/RotMatrix.cpp b/Base/Vector/RotMatrix.cpp
index ebe5c471523cf80c695f76f339a0ad9b76c7e6fe..42d27ec6c0af50fb7db148855e2411afe83d7a0a 100644
--- a/Base/Vector/RotMatrix.cpp
+++ b/Base/Vector/RotMatrix.cpp
@@ -3,7 +3,7 @@
 //  BornAgain: simulate and fit reflection and scattering
 //
 //! @file      Base/Vector/RotMatrix.cpp
-//! @brief      Implements template class RotMatrix.
+//! @brief     Implements class RotMatrix.
 //!
 //! @homepage  http://www.bornagainproject.org
 //! @license   GNU General Public License v3 or higher (see COPYING)
diff --git a/Base/Vector/RotMatrix.h b/Base/Vector/RotMatrix.h
index 99152d8ae83e7cd41ba16854efbbf2d4b26cf7cd..9559667362c0f251d5d929b4c9d9f6c80c678280 100644
--- a/Base/Vector/RotMatrix.h
+++ b/Base/Vector/RotMatrix.h
@@ -19,7 +19,8 @@
 #include <heinz/Vectors3D.h>
 #include <optional>
 
-//! Rotation matrix in three dimensions.
+//! Rotation matrix in three dimensions. Represents group SO(3).
+//! Internal parameterization based on quaternions.
 
 class RotMatrix {
 public: