1 files changed, 2 insertions, 0 deletions

diff --git a/include/opkele/consumer.h b/include/opkele/consumer.h
index b9d1e54..50ff692 100644
--- a/include/opkele/consumer.h
+++ b/include/opkele/consumer.h
@@ -13,24 +13,26 @@ namespace opkele {
 
     /**
      * implementation of basic consumer functionality
      *
      * @note
      * The consumer uses libcurl internally, which means that if you're using
      * libopkele in multithreaded environment you should call curl_global_init
      * yourself before spawning any threads.
      */
     class consumer_t {
         public:
 
+            virtual ~consumer_t() { }
+
             /**
              * store association. The function should be overridden in the real
              * implementation to provide persistent associations store.
              * @param server the OpenID server
              * @param handle association handle
              * @param secret the secret associated with the server and handle
              * @param expires_in the number of seconds until the handle is expired
              * @return the auto_ptr<> for the newly allocated association_t object
              */
             virtual assoc_t store_assoc(const string& server,const string& handle,const secret_t& secret,int expires_in) = 0;
             /**
              * retrieve stored association. The function should be overridden