diff --git a/src/core/model/attribute-accessor-helper.h b/src/core/model/attribute-accessor-helper.h
index 2848c0ad8..770b0a01c 100644
--- a/src/core/model/attribute-accessor-helper.h
+++ b/src/core/model/attribute-accessor-helper.h
@@ -493,7 +493,7 @@ DoMakeAccessorHelperTwo (void (T::*setter)(U),
 
 /**
  * \ingroup attributeimpl
- * \copydoc DoMakeAccessorHelperTwo(void(T::*)(U),V(T::*)(void)const)
+ * \copydoc DoMakeAccessorHelperTwo(void(T::*)(U),V(T::*)()const)
  */
 template <typename W, typename T, typename U, typename V>
 inline
@@ -581,7 +581,7 @@ DoMakeAccessorHelperTwo (bool (T::*setter)(U),
 
 /**
  * \ingroup attributeimpl
- * \copydoc ns3::DoMakeAccessorHelperTwo(bool(T::*)(U),V(T::*)(void)const)
+ * \copydoc ns3::DoMakeAccessorHelperTwo(bool(T::*)(U),V(T::*)()const)
  */
 template <typename W, typename T, typename U, typename V>
 inline
diff --git a/src/core/model/make-event.h b/src/core/model/make-event.h
index d1d7330c3..0a460c8f6 100644
--- a/src/core/model/make-event.h
+++ b/src/core/model/make-event.h
@@ -191,7 +191,7 @@ EventImpl * MakeEvent (MEM mem_ptr, OBJ obj,
 EventImpl * MakeEvent (void (*f)());
 
 /**
- * \copybrief MakeEvent(void(*f)(void))
+ * \copybrief MakeEvent(void(*f)())
  * \tparam U1 \deduced Formal type of the argument to the function.
  * \tparam T1 \deduced Actual type of the argument to the function.
  * \param [in] f The function pointer.
@@ -203,7 +203,7 @@ template <typename U1,
 EventImpl * MakeEvent (void (*f)(U1), T1 a1);
 
 /**
- * \copybrief MakeEvent(void(*f)(void))
+ * \copybrief MakeEvent(void(*f)())
  * \tparam U1 \deduced Formal type of the first argument to the function.
  * \tparam U2 \deduced Formal type of the second argument to the function.
  * \tparam T1 \deduced Actual type of the first argument to the function.
@@ -218,7 +218,7 @@ template <typename U1, typename U2,
 EventImpl * MakeEvent (void (*f)(U1,U2), T1 a1, T2 a2);
 
 /**
- * \copybrief MakeEvent(void(*f)(void))
+ * \copybrief MakeEvent(void(*f)())
  * \tparam U1 \deduced Formal type of the first argument to the function.
  * \tparam U2 \deduced Formal type of the second argument to the function.
  * \tparam U3 \deduced Formal type of the third argument to the function.
@@ -236,7 +236,7 @@ template <typename U1, typename U2, typename U3,
 EventImpl * MakeEvent (void (*f)(U1,U2,U3), T1 a1, T2 a2, T3 a3);
 
 /**
- * \copybrief MakeEvent(void(*f)(void))
+ * \copybrief MakeEvent(void(*f)())
  * \tparam U1 \deduced Formal type of the first argument to the function.
  * \tparam U2 \deduced Formal type of the second argument to the function.
  * \tparam U3 \deduced Formal type of the third argument to the function.
@@ -257,7 +257,7 @@ template <typename U1, typename U2, typename U3, typename U4,
 EventImpl * MakeEvent (void (*f)(U1,U2,U3,U4), T1 a1, T2 a2, T3 a3, T4 a4);
 
 /**
- * \copybrief MakeEvent(void(*f)(void))
+ * \copybrief MakeEvent(void(*f)())
  * \tparam U1 \deduced Formal type of the first argument to the function.
  * \tparam U2 \deduced Formal type of the second argument to the function.
  * \tparam U3 \deduced Formal type of the third argument to the function.
@@ -281,7 +281,7 @@ template <typename U1, typename U2, typename U3, typename U4, typename U5,
 EventImpl * MakeEvent (void (*f)(U1,U2,U3,U4,U5), T1 a1, T2 a2, T3 a3, T4 a4, T5 a5);
 
 /**
- * \copybrief MakeEvent(void(*f)(void))
+ * \copybrief MakeEvent(void(*f)())
  * \tparam U1 Formal type of the first argument to the function.
  * \tparam U2 Formal type of the second argument to the function.
  * \tparam U3 Formal type of the third argument to the function.
diff --git a/src/lte/model/lte-enb-rrc.h b/src/lte/model/lte-enb-rrc.h
index 0d6b553c7..884a738d7 100644
--- a/src/lte/model/lte-enb-rrc.h
+++ b/src/lte/model/lte-enb-rrc.h
@@ -395,11 +395,13 @@ public:
 
   /**
    * \brief build handover preparation failure message
+   * \return the handover preparation failure message.
    */
   EpcX2Sap::HandoverPreparationFailureParams BuildHoPrepFailMsg ();
 
   /**
    * \brief build handover cancel message
+   * \return the handover cancel message.
    */
   EpcX2Sap::HandoverCancelParams BuildHoCancelMsg ();