2 files changed, 2 insertions, 0 deletions

diff --git a/src/FbTk/FbWindow.hh b/src/FbTk/FbWindow.hh
index 3a5d18d..8f7376c 100644
--- a/src/FbTk/FbWindow.hh
+++ b/src/FbTk/FbWindow.hh
@@ -266,6 +266,7 @@ private:
 class FbWindowRenderer {
 public:
     virtual void renderForeground(FbWindow &win, FbDrawable &drawable) = 0;
+    virtual ~FbWindowRenderer() { }
 };
 
 
diff --git a/src/FbTk/SignalHandler.hh b/src/FbTk/SignalHandler.hh
index 23bac97..7b013cf 100644
--- a/src/FbTk/SignalHandler.hh
+++ b/src/FbTk/SignalHandler.hh
@@ -33,6 +33,7 @@ namespace FbTk {
 class SignalEventHandler {
 public:
     virtual void handleSignal(int signum) = 0;
+    virtual ~SignalEventHandler() { }
 };
 
 ///   Handles system signals, singleton.