diff --git a/src/basic/missing_sched.h b/src/basic/missing_sched.h
index bd83b41a71..bbfc30cc8f 100644
--- a/src/basic/missing_sched.h
+++ b/src/basic/missing_sched.h
@@ -6,6 +6,7 @@
 
 #include "macro.h"
 
+/* 5e2bec7c2248ae27c5b16cd97215ae05c1d39179 (4.6) */
 #ifndef CLONE_NEWCGROUP
 #  define CLONE_NEWCGROUP 0x02000000
 #else