diff --git a/src/guiDeathScreen.h b/src/guiDeathScreen.h
index 10a97d7..54cc49b 100644
--- a/src/guiDeathScreen.h
+++ b/src/guiDeathScreen.h
@@ -29,6 +29,7 @@ class IRespawnInitiator
 {
 public:
 	virtual void respawn() = 0;
+	virtual ~IRespawnInitiator() {};
 };
 
 class GUIDeathScreen : public GUIModalMenu
diff --git a/src/guiTextInputMenu.h b/src/guiTextInputMenu.h
index c679aa9..2939cf6 100644
--- a/src/guiTextInputMenu.h
+++ b/src/guiTextInputMenu.h
@@ -28,6 +28,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 struct TextDest
 {
 	virtual void gotText(std::wstring text) = 0;
+	virtual ~TextDest() {};
 };
 
 class GUITextInputMenu : public GUIModalMenu
diff --git a/src/inventory.h b/src/inventory.h
index c16b9a3..795d32d 100644
--- a/src/inventory.h
+++ b/src/inventory.h
@@ -554,11 +554,12 @@ public:
 struct InventoryAction
 {
 	static InventoryAction * deSerialize(std::istream &is);
-	
+
 	virtual u16 getType() const = 0;
 	virtual void serialize(std::ostream &os) const = 0;
 	virtual void apply(InventoryContext *c, InventoryManager *mgr,
 			ServerEnvironment *env) = 0;
+	virtual ~InventoryAction() {};
 };
 
 struct IMoveAction : public InventoryAction