diff --git a/include/osgUtil/DelaunayTriangulator b/include/osgUtil/DelaunayTriangulator
index 9e50dd829..4c01d0268 100644
--- a/include/osgUtil/DelaunayTriangulator
+++ b/include/osgUtil/DelaunayTriangulator
@@ -95,7 +95,7 @@ public:
     void handleOverlaps(void);
 
 protected:
-    virtual ~DelaunayConstraint() {}
+    virtual ~DelaunayConstraint();
 
     typedef std::vector< int* > trilist; // array of indices in points array defining triangles
 
diff --git a/src/osgUtil/DelaunayTriangulator.cpp b/src/osgUtil/DelaunayTriangulator.cpp
index 8fef869b9..658631549 100644
--- a/src/osgUtil/DelaunayTriangulator.cpp
+++ b/src/osgUtil/DelaunayTriangulator.cpp
@@ -1372,4 +1372,13 @@ void DelaunayConstraint::handleOverlaps(void)
     tscx->retessellatePolygons(*this); // find all edges
 }
 
+DelaunayConstraint::~DelaunayConstraint()
+{
+    trilist::const_iterator ti;
+    for (ti=_interiorTris.begin(); ti!=_interiorTris.end(); ++ti)
+    {
+        delete[] *ti;
+    }
+}
+
 } // namespace osgutil