diff --git a/eo/src/eoFunctorStore.h b/eo/src/eoFunctorStore.h
index 1655fb00..9baef09f 100644
--- a/eo/src/eoFunctorStore.h
+++ b/eo/src/eoFunctorStore.h
@@ -3,7 +3,7 @@
 //-----------------------------------------------------------------------------
 // eoFunctorStore.h
 // (c) Maarten Keijzer 2000, GeNeura Team, 2000
-/* 
+/*
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
@@ -42,7 +42,7 @@ class eoFunctorStore
 
         eoFunctorStore() {}
 
-        ~eoFunctorStore();
+        virtual ~eoFunctorStore();
 
         /// Add an eoFunctorBase to the store
         template <class Functor>