1 files changed, 4 insertions, 4 deletions

diff --git a/src/stable/mutex.h b/src/stable/mutex.h
index d9e8910..8034974 100644
--- a/src/stable/mutex.h
+++ b/src/stable/mutex.h
@@ -33,7 +33,7 @@ namespace Bu
          * wait for the mutex to unlock, the odds of which are usually farily
          * low at deconstruction time.
          */
-        ~Mutex();
+        virtual ~Mutex();
 
         /**
          * Lock the mutex.  This causes all future calls to lock on this
@@ -44,13 +44,13 @@ namespace Bu
          * computation within a locked section.  This can cause thread-deadlock
          * and your program may hang.
          */
-        int lock();
+        virtual int lock();
 
         /**
          * Unlock the mutex.  This allows the next thread that asked for a lock
          * to lock the mutex and continue with execution.
          */
-        int unlock();
+        virtual int unlock();
 
         /**
          * Try to lock the mutex.  This is the option to go with if you cannot
@@ -58,7 +58,7 @@ namespace Bu
          * will attempt to lock the mutex, if the mutex is already locked this
          * function returns immediately with an error code.
          */
-        int trylock();
+        virtual int trylock();
 
     protected:
         pthread_mutex_t mutex;  /**< The internal mutex reference. */