diff --git a/lib/error_numbers.h b/lib/error_numbers.h
index 1a98a749c8..b4dbd759d4 100755
--- a/lib/error_numbers.h
+++ b/lib/error_numbers.h
@@ -101,3 +101,4 @@
     // scheduler request host ID doesn't match authenticator
 #define ERR_SCHED_SHMEM     -156
     // sched shmem has bad contents
+#define ERR_ASYNCSELECT     -157