3 files changed, 3 insertions, 3 deletions
diff --git a/src/libavoid/connector.h b/src/libavoid/connector.h
index a313e3bb4..64afb4dda 100644
--- a/src/libavoid/connector.h
+++ b/src/libavoid/connector.h
@@ -42,7 +42,7 @@ class ConnRef
         ConnRef(Router *router, const unsigned int id);
         ConnRef(Router *router, const unsigned int id,
                 const Point& src, const Point& dst);
-        ~ConnRef();
+        virtual ~ConnRef();
         
         void setType(unsigned int type);
         PolyLine& route(void);
diff --git a/src/libavoid/graph.h b/src/libavoid/graph.h
index c4de3df08..05f03a988 100644
--- a/src/libavoid/graph.h
+++ b/src/libavoid/graph.h
@@ -43,7 +43,7 @@ class EdgeInf
 {
     public:
         EdgeInf(VertInf *v1, VertInf *v2);
-        ~EdgeInf();
+        virtual ~EdgeInf();
         inline double getDist(void)
         {
             return _dist;
diff --git a/src/libavoid/shape.h b/src/libavoid/shape.h
index 28f38298d..b654c6eea 100644
--- a/src/libavoid/shape.h
+++ b/src/libavoid/shape.h
@@ -39,7 +39,7 @@ class ShapeRef
 {
     public:
         ShapeRef(Router *router, unsigned int id, Polygn& poly);
-        ~ShapeRef();
+        virtual ~ShapeRef();
         void setNewPoly(Polygn& poly);
         VertInf *firstVert(void);
         VertInf *lastVert(void);