diff --git a/src/internet/model/tcp-header.cc b/src/internet/model/tcp-header.cc
index 3fa09ec19..cc3b7f7da 100644
--- a/src/internet/model/tcp-header.cc
+++ b/src/internet/model/tcp-header.cc
@@ -35,25 +35,6 @@ NS_LOG_COMPONENT_DEFINE("TcpHeader");
 
 NS_OBJECT_ENSURE_REGISTERED(TcpHeader);
 
-TcpHeader::TcpHeader()
-    : m_sourcePort(0),
-      m_destinationPort(0),
-      m_sequenceNumber(0),
-      m_ackNumber(0),
-      m_length(5),
-      m_flags(0),
-      m_windowSize(0xffff),
-      m_urgentPointer(0),
-      m_calcChecksum(false),
-      m_goodChecksum(true),
-      m_optionsLen(0)
-{
-}
-
-TcpHeader::~TcpHeader()
-{
-}
-
 std::string
 TcpHeader::FlagsToString(uint8_t flags, const std::string& delimiter)
 {
diff --git a/src/internet/model/tcp-header.h b/src/internet/model/tcp-header.h
index 96c9aef04..1d7a94804 100644
--- a/src/internet/model/tcp-header.h
+++ b/src/internet/model/tcp-header.h
@@ -45,9 +45,6 @@ namespace ns3
 class TcpHeader : public Header
 {
   public:
-    TcpHeader();
-    ~TcpHeader() override;
-
     typedef std::list<Ptr<const TcpOption>> TcpOptionList; //!< List of TcpOption
 
     /**
@@ -331,25 +328,25 @@ class TcpHeader : public Header
      */
     uint8_t CalculateHeaderLength() const;
 
-    uint16_t m_sourcePort;             //!< Source port
-    uint16_t m_destinationPort;        //!< Destination port
-    SequenceNumber32 m_sequenceNumber; //!< Sequence number
-    SequenceNumber32 m_ackNumber;      //!< ACK number
-    uint8_t m_length;                  //!< Length (really a uint4_t) in words.
-    uint8_t m_flags;                   //!< Flags (really a uint6_t)
-    uint16_t m_windowSize;             //!< Window size
-    uint16_t m_urgentPointer;          //!< Urgent pointer
+    uint16_t m_sourcePort{0};             //!< Source port
+    uint16_t m_destinationPort{0};        //!< Destination port
+    SequenceNumber32 m_sequenceNumber{0}; //!< Sequence number
+    SequenceNumber32 m_ackNumber{0};      //!< ACK number
+    uint8_t m_length{5};                  //!< Length (really a uint4_t) in words.
+    uint8_t m_flags{0};                   //!< Flags (really a uint6_t)
+    uint16_t m_windowSize{0xffff};        //!< Window size
+    uint16_t m_urgentPointer{0};          //!< Urgent pointer
 
     Address m_source;      //!< Source IP address
     Address m_destination; //!< Destination IP address
-    uint8_t m_protocol;    //!< Protocol number
+    uint8_t m_protocol{6}; //!< Protocol number
 
-    bool m_calcChecksum; //!< Flag to calculate checksum
-    bool m_goodChecksum; //!< Flag to indicate that checksum is correct
+    bool m_calcChecksum{false}; //!< Flag to calculate checksum
+    bool m_goodChecksum{true};  //!< Flag to indicate that checksum is correct
 
     static const uint8_t m_maxOptionsLen = 40; //!< Maximum options length
     TcpOptionList m_options;                   //!< TcpOption present in the header
-    uint8_t m_optionsLen;                      //!< Tcp options length.
+    uint8_t m_optionsLen{0};                   //!< Tcp options length.
 };
 
 } // namespace ns3
diff --git a/src/internet/model/udp-header.cc b/src/internet/model/udp-header.cc
index 3d6c49011..ec03f19ba 100644
--- a/src/internet/model/udp-header.cc
+++ b/src/internet/model/udp-header.cc
@@ -26,26 +26,6 @@ namespace ns3
 
 NS_OBJECT_ENSURE_REGISTERED(UdpHeader);
 
-/* The magic values below are used only for debugging.
- * They can be used to easily detect memory corruption
- * problems so you can see the patterns in memory.
- */
-UdpHeader::UdpHeader()
-    : m_sourcePort(0xfffd),
-      m_destinationPort(0xfffd),
-      m_checksum(0),
-      m_calcChecksum(false),
-      m_goodChecksum(true)
-{
-}
-
-UdpHeader::~UdpHeader()
-{
-    m_sourcePort = 0xfffe;
-    m_destinationPort = 0xfffe;
-    m_payloadSize = 0xfffe;
-}
-
 void
 UdpHeader::EnableChecksums()
 {
diff --git a/src/internet/model/udp-header.h b/src/internet/model/udp-header.h
index 43fba6e6a..52400714f 100644
--- a/src/internet/model/udp-header.h
+++ b/src/internet/model/udp-header.h
@@ -40,14 +40,6 @@ namespace ns3
 class UdpHeader : public Header
 {
   public:
-    /**
-     * \brief Constructor
-     *
-     * Creates a null header
-     */
-    UdpHeader();
-    ~UdpHeader() override;
-
     /**
      * \brief Enable checksum calculation for UDP
      */
@@ -167,17 +159,21 @@ class UdpHeader : public Header
      * \returns the checksum
      */
     uint16_t CalculateHeaderChecksum(uint16_t size) const;
-    uint16_t m_sourcePort;           //!< Source port
-    uint16_t m_destinationPort;      //!< Destination port
-    uint16_t m_payloadSize{0};       //!< Payload size
-    uint16_t m_forcedPayloadSize{0}; //!< Payload size (forced)
 
-    Address m_source;      //!< Source IP address
-    Address m_destination; //!< Destination IP address
-    uint8_t m_protocol;    //!< Protocol number
-    uint16_t m_checksum;   //!< Forced Checksum value
-    bool m_calcChecksum;   //!< Flag to calculate checksum
-    bool m_goodChecksum;   //!< Flag to indicate that checksum is correct
+    // The magic values below are used only for debugging.
+    // They can be used to easily detect memory corruption
+    // problems so you can see the patterns in memory.
+    uint16_t m_sourcePort{0xfffd};      //!< Source port
+    uint16_t m_destinationPort{0xfffd}; //!< Destination port
+    uint16_t m_payloadSize{0};          //!< Payload size
+    uint16_t m_forcedPayloadSize{0};    //!< Payload size (forced)
+
+    Address m_source;           //!< Source IP address
+    Address m_destination;      //!< Destination IP address
+    uint8_t m_protocol{17};     //!< Protocol number
+    uint16_t m_checksum{0};     //!< Forced Checksum value
+    bool m_calcChecksum{false}; //!< Flag to calculate checksum
+    bool m_goodChecksum{true};  //!< Flag to indicate that checksum is correct
 };
 
 } // namespace ns3