diff --git a/wrap/ReturnValue.h b/wrap/ReturnValue.h
index ea78923f6..2bc5aa82b 100644
--- a/wrap/ReturnValue.h
+++ b/wrap/ReturnValue.h
@@ -17,23 +17,28 @@
 
 namespace wrap {
 
+/**
+ * Encapsulates return value of a method or function
+ */
 struct ReturnValue {
 
+  /// the different supported return value categories
   typedef enum {
     CLASS = 1, EIGEN = 2, BASIS = 3, VOID = 4
   } return_category;
 
-  ReturnValue(bool enable_verbosity = true) :
-      verbose(enable_verbosity), isPtr1(false), isPtr2(false), isPair(false), category1(
-          CLASS), category2(CLASS) {
-  }
-
   bool verbose;
   bool isPtr1, isPtr2, isPair;
   return_category category1, category2;
   std::string type1, type2;
   std::vector<std::string> namespaces1, namespaces2;
 
+  /// Constructor
+  ReturnValue(bool enable_verbosity = true) :
+      verbose(enable_verbosity), isPtr1(false), isPtr2(false), isPair(false), category1(
+          CLASS), category2(CLASS) {
+  }
+
   typedef enum {
     arg1, arg2, pair
   } pairing;