diff --git a/src/devices/bridge/bridge-channel.cc b/src/devices/bridge/bridge-channel.cc
index 26ec993c9..7029c5251 100644
--- a/src/devices/bridge/bridge-channel.cc
+++ b/src/devices/bridge/bridge-channel.cc
@@ -44,8 +44,16 @@ BridgeChannel::BridgeChannel ()
 BridgeChannel::~BridgeChannel ()
 {
   NS_LOG_FUNCTION_NOARGS ();
+
+  for (std::vector< Ptr<Channel> >::iterator iter = m_bridgedChannels.begin ();
+       iter != m_bridgedChannels.end (); iter++)
+    {
+      *iter = 0;
+    }
+  m_bridgedChannels.clear ();
 }
 
+
 void
 BridgeChannel::AddChannel (Ptr<Channel> bridgedChannel)
 {
diff --git a/src/devices/mesh/dot11s/peer-management-protocol.cc b/src/devices/mesh/dot11s/peer-management-protocol.cc
index cff61506a..415fa8f69 100644
--- a/src/devices/mesh/dot11s/peer-management-protocol.cc
+++ b/src/devices/mesh/dot11s/peer-management-protocol.cc
@@ -71,6 +71,7 @@ PeerManagementProtocol::PeerManagementProtocol () :
 }
 PeerManagementProtocol::~PeerManagementProtocol ()
 {
+  m_meshId = 0;
 }
 void
 PeerManagementProtocol::DoDispose ()
diff --git a/src/devices/mesh/mesh-l2-routing-protocol.cc b/src/devices/mesh/mesh-l2-routing-protocol.cc
index e4f242fbf..176ea222c 100644
--- a/src/devices/mesh/mesh-l2-routing-protocol.cc
+++ b/src/devices/mesh/mesh-l2-routing-protocol.cc
@@ -39,6 +39,7 @@ MeshL2RoutingProtocol::GetTypeId (void)
 
 MeshL2RoutingProtocol::~MeshL2RoutingProtocol ()
 {
+  m_mp = 0;
 }
 
 void
diff --git a/src/devices/mesh/mesh-wifi-interface-mac.cc b/src/devices/mesh/mesh-wifi-interface-mac.cc
index de97fd912..247947318 100644
--- a/src/devices/mesh/mesh-wifi-interface-mac.cc
+++ b/src/devices/mesh/mesh-wifi-interface-mac.cc
@@ -109,6 +109,10 @@ MeshWifiInterfaceMac::MeshWifiInterfaceMac ()
 MeshWifiInterfaceMac::~MeshWifiInterfaceMac ()
 {
   NS_LOG_FUNCTION (this);
+  m_beaconDca = 0;
+  m_stationManager = 0;
+  m_phy = 0;
+  m_low = 0;
 }
 //-----------------------------------------------------------------------------
 // WifiMac inherited
diff --git a/src/devices/mesh/wifi-information-element-vector.cc b/src/devices/mesh/wifi-information-element-vector.cc
index f44e0e646..9c3dbb641 100644
--- a/src/devices/mesh/wifi-information-element-vector.cc
+++ b/src/devices/mesh/wifi-information-element-vector.cc
@@ -48,6 +48,11 @@ WifiInformationElementVector::WifiInformationElementVector () :
 }
 WifiInformationElementVector::~WifiInformationElementVector ()
 {
+  for (IE_VECTOR::iterator i = m_elements.begin (); i != m_elements.end (); i++)
+    {
+      *i = 0;
+    }
+  m_elements.clear ();
 }
 TypeId
 WifiInformationElementVector::GetTypeId ()
diff --git a/src/devices/wifi/interference-helper.cc b/src/devices/wifi/interference-helper.cc
index 221dad65b..b85183f1d 100644
--- a/src/devices/wifi/interference-helper.cc
+++ b/src/devices/wifi/interference-helper.cc
@@ -128,6 +128,7 @@ InterferenceHelper::InterferenceHelper ()
 {}
 InterferenceHelper::~InterferenceHelper ()
 {
+  EraseEvents ();
   m_errorRateModel = 0;
 }
 
diff --git a/src/helper/mesh-helper.cc b/src/helper/mesh-helper.cc
index 876afb00f..2c4aa7a5d 100644
--- a/src/helper/mesh-helper.cc
+++ b/src/helper/mesh-helper.cc
@@ -32,6 +32,10 @@ MeshHelper::MeshHelper () :
   m_standard (WIFI_PHY_STANDARD_80211a)
 {
 }
+MeshHelper::~MeshHelper ()
+{
+  m_stack = 0;
+}
 void
 MeshHelper::SetSpreadInterfaceChannels (enum ChannelPolicy policy)
 {
diff --git a/src/helper/mesh-helper.h b/src/helper/mesh-helper.h
index 1a343988b..31aca274e 100644
--- a/src/helper/mesh-helper.h
+++ b/src/helper/mesh-helper.h
@@ -43,6 +43,11 @@ public:
    */
   MeshHelper ();
 
+  /**
+   * Destroy a MeshHelper.
+   */
+  ~MeshHelper ();
+
   /**
    * \brief Set the helper to the default values for the MAC type,  remote
    * station manager and channel policy.