--- a/master/sync.c	Thu Feb 28 11:07:40 2008 +0000
+++ b/master/sync.c	Thu Feb 28 11:23:34 2008 +0000
@@ -107,7 +107,7 @@
         const ec_pdo_t *pdo /**< Pdo to map. */
         )
 {
-    return ec_pdo_mapping_add_pdo(&sync->mapping, pdo);
+    return ec_pdo_mapping_add_pdo_copy(&sync->mapping, pdo);
 }
 
 /*****************************************************************************/