diff --git a/include/asterisk/sched.h b/include/asterisk/sched.h
index 60a6605630..594f05a27f 100644
--- a/include/asterisk/sched.h
+++ b/include/asterisk/sched.h
@@ -79,13 +79,13 @@ extern "C" {
  */
 #define AST_SCHED_DEL_UNREF(sched, id, refcall)			\
 	do { \
-		int _count = 0, _id; \
-		while ((_id = id) > -1 && ast_sched_del(sched, _id) && ++_count < 10) { \
+		int _count = 0, _id, _ret = 0; \
+		while ((_id = id) > -1 && (( _ret = ast_sched_del(sched, _id)) == -1) && ++_count < 10) { \
 			usleep(1); \
 		} \
 		if (_count == 10) { \
 			ast_log(LOG_WARNING, "Unable to cancel schedule ID %d.  This is probably a bug (%s: %s, line %d).\n", _id, __FILE__, __PRETTY_FUNCTION__, __LINE__); \
-		} else if (_id > -1) { \
+		} else if (_id > -1 && _ret >-2) { \
 			refcall; \
 			id = -1; \
 		} \
@@ -287,7 +287,7 @@ const void *ast_sched_find_data(struct ast_sched_context *con, int id);
  * \param con scheduling context to delete item from
  * \param id ID of the scheduled item to delete
  *
- * \return Returns 0 on success, -1 on failure
+ * \return Returns 0 on success, -1 on failure, -2 if the event was running and not rescheduled
  */
 int ast_sched_del(struct ast_sched_context *con, int id) attribute_warn_unused_result;