1 files changed, 2 insertions, 0 deletions

diff --git a/src/util/scheduler.c b/src/util/scheduler.c
index 41cce0b45..b5d998ef5 100644
--- a/src/util/scheduler.c
+++ b/src/util/scheduler.c
@@ -1098,6 +1098,8 @@ GNUNET_SCHEDULER_add_select (struct GNUNET_SCHEDULER_Handle * sched,
 #if EXECINFO
   void *backtrace_array[MAX_TRACE_DEPTH];
 #endif
+
+  GNUNET_assert (NULL != task);
   t = GNUNET_malloc (sizeof (struct Task));
   t->callback = task;
   t->callback_cls = task_cls;