diff --git a/src/devices/spectrum/wifi-spectrum-value-helper.cc b/src/devices/spectrum/wifi-spectrum-value-helper.cc
index e452a47dc..1768b6185 100644
--- a/src/devices/spectrum/wifi-spectrum-value-helper.cc
+++ b/src/devices/spectrum/wifi-spectrum-value-helper.cc
@@ -26,6 +26,13 @@ namespace ns3 {
   
 Ptr<SpectrumModel> g_WifiSpectrumModel5Mhz;
 
+WifiSpectrumValueHelper::~WifiSpectrumValueHelper ()
+{
+}
+
+WifiSpectrumValue5MhzFactory::~WifiSpectrumValue5MhzFactory ()
+{
+}
 
 class WifiSpectrumModel5MhzInitializer
 {
diff --git a/src/devices/spectrum/wifi-spectrum-value-helper.h b/src/devices/spectrum/wifi-spectrum-value-helper.h
index 67ce0af33..51cd0e4dd 100644
--- a/src/devices/spectrum/wifi-spectrum-value-helper.h
+++ b/src/devices/spectrum/wifi-spectrum-value-helper.h
@@ -35,7 +35,7 @@ namespace ns3 {
 class WifiSpectrumValueHelper 
 {
 public:
-
+  virtual ~WifiSpectrumValueHelper ();
   /*
    *
    * @param value the constant value
@@ -78,7 +78,7 @@ public:
 class WifiSpectrumValue5MhzFactory
 {
 public:
-
+  virtual ~WifiSpectrumValue5MhzFactory ();
   // inherited from WifiSpectrumValue
   virtual Ptr<SpectrumValue> CreateConstant (double psd);
   virtual Ptr<SpectrumValue> CreateTxPowerSpectralDensity (double txPower, uint32_t channel);
diff --git a/src/devices/uan/uan-phy.h b/src/devices/uan/uan-phy.h
index f0791d348..8e6bab756 100644
--- a/src/devices/uan/uan-phy.h
+++ b/src/devices/uan/uan-phy.h
@@ -109,6 +109,7 @@ public:
 class UanPhyListener
 {
 public:
+  virtual ~UanPhyListener () {}
   /**
    * \brief Function called when Phy object begins receiving packet
    */