diff --git a/common/rfb/ImageGetter.h b/common/rfb/ImageGetter.h
index 290249f..2e7bf37 100644
--- a/common/rfb/ImageGetter.h
+++ b/common/rfb/ImageGetter.h
@@ -25,6 +25,7 @@
   public:
     virtual void getImage(void* imageBuf,
                           const Rect& r, int stride=0) = 0;
+    virtual ~ImageGetter() {}
   };
 }
 #endif