diff --git a/src/internet/model/ipv4-l3-protocol.h b/src/internet/model/ipv4-l3-protocol.h
index 7cd82003d..3ebaa45d4 100644
--- a/src/internet/model/ipv4-l3-protocol.h
+++ b/src/internet/model/ipv4-l3-protocol.h
@@ -225,9 +225,9 @@ public:
   /**
    * TracedCallback signature for packet send, forward, or local deliver events.
    *
-   * \param [in] header The Ipv4Header.
-   * \param [in] packet The packet.
-   * \param [in] interface
+   * \param [in] header the Ipv4Header
+   * \param [in] packet the packet
+   * \param [in] interface IP-level interface number
    */
   typedef void (* SentTracedCallback)
       (const Ipv4Header & header, Ptr<const Packet> packet, uint32_t interface);
@@ -235,9 +235,9 @@ public:
   /**
    * TracedCallback signature for packet transmission or reception events.
    *
-   * \param [in] packet The packet.
-   * \param [in] ipv4
-   * \param [in] interface
+   * \param [in] packet the packet.
+   * \param [in] ipv4 the Ipv4 protocol
+   * \param [in] interface IP-level interface number
    * \deprecated The non-const \c Ptr<Ipv4> argument is deprecated
    * and will be changed to \c Ptr<const Ipv4> in a future release.
    */
@@ -247,11 +247,11 @@ public:
   /**
    * TracedCallback signature for packet drop events.
    *
-   * \param [in] header The Ipv4Header.
-   * \param [in] packet The packet.
-   * \param [in] reason The reason the packet was dropped.
-   * \param [in] ipv4
-   * \param [in] interface
+   * \param [in] header the Ipv4Header.
+   * \param [in] packet the packet.
+   * \param [in] reason the reason the packet was dropped.
+   * \param [in] ipv4 the Ipv4 protocol
+   * \param [in] interface IP-level interface number
    * \deprecated The non-const \c Ptr<Ipv4> argument is deprecated
    * and will be changed to \c Ptr<const Ipv4> in a future release.
    */
@@ -429,7 +429,7 @@ private:
    * \param ipHeader the IP header that will be added to the packet
    * \param packet the packet
    * \param ipv4 the Ipv4 protocol
-   * \param interface the interface index
+   * \param interface the IP-level interface index
    *
    * Note: If the TracedCallback API ever is extended, we could consider
    * to check for connected functions before adding the header
diff --git a/src/internet/model/ipv6-l3-protocol.h b/src/internet/model/ipv6-l3-protocol.h
index e3e812657..9f7c12163 100644
--- a/src/internet/model/ipv6-l3-protocol.h
+++ b/src/internet/model/ipv6-l3-protocol.h
@@ -372,19 +372,19 @@ public:
    * TracedCallback signature for packet sent, forwarded or
    * local-delivered events.
    *
-   * \param [in] header The Ipv6Header.
-   * \param [in] packet The packet.
-   * \param [in] interface
+   * \param [in] header the Ipv6Header.
+   * \param [in] packet the packet.
+   * \param [in] interface the IP-level interface index
    */
   typedef void (* SentTracedCallback)
     (const Ipv6Header & header, Ptr<const Packet> packet, uint32_t interface);
-   
+
   /**
    * TracedCallback signature for packet transmission or reception events.
    *
-   * \param [in] packet The packet.
-   * \param [in] ipv6
-   * \param [in] interface
+   * \param [in] packet the packet.
+   * \param [in] ipv6 the Ipv6 protocol
+   * \param [in] interface the IP-level interface index
    * \deprecated The non-const \c Ptr<Ipv6> argument is deprecated
    * and will be changed to \c Ptr<const Ipv6> in a future release.
    */
@@ -394,11 +394,11 @@ public:
   /**
    * TracedCallback signature for packet drop events.
    *
-   * \param [in] header The Ipv6Header.
-   * \param [in] packet The packet.
-   * \param [in] reason The reason the packet was dropped.
-   * \param [in] ipv6
-   * \param [in] interface
+   * \param [in] header the Ipv6Header.
+   * \param [in] packet the packet.
+   * \param [in] reason the reason the packet was dropped.
+   * \param [in] ipv6 the Ipv6 protocol
+   * \param [in] interface the IP-level interface index
    * \deprecated The non-const \c Ptr<Ipv6> argument is deprecated
    * and will be changed to \c Ptr<const Ipv6> in a future release.
    */
@@ -532,7 +532,7 @@ private:
    * \param ipHeader the IP header that will be added to the packet
    * \param packet the packet
    * \param ipv6 the Ipv6 protocol
-   * \param interface the interface index
+   * \param interface the IP-level interface index
    *
    * Note: If the TracedCallback API ever is extended, we could consider
    * to check for connected functions before adding the header