--- a/sql/debug_sync.cc
+++ b/sql/debug_sync.cc
@@ -1737,7 +1737,7 @@
     if (action->wait_for.length())
     {
       mysql_mutex_t *old_mutex;
-      mysql_cond_t  *old_cond;
+      mysql_cond_t*  UNINIT_VAR(old_cond);
       int             error= 0;
       struct timespec abstime;