diff --git a/src/random.h b/src/random.h
index b41a7262..f85ca167 100644
--- a/src/random.h
+++ b/src/random.h
@@ -35,6 +35,9 @@ SOFTWARE.
 
 namespace etl
 {
+  //***************************************************************************
+  /// The base for all 32 bit random number generators.
+  //***************************************************************************
   class random
   {
   public: