diff --git a/man2/futex.2 b/man2/futex.2
index 49b1b5b5d..11591765c 100644
--- a/man2/futex.2
+++ b/man2/futex.2
@@ -748,6 +748,13 @@ use the safe
 .B FUTEX_WAKE
 now.)
 .TP
+.BR EAGAIN
+.RB ( FUTEX_LOCK_PI ,
+.BR FUTEX_TRYLOCK_PI )
+The futex owner thread ID is about to exit,
+but has not yet handled the internal state cleanup.
+Try again.
+.TP
 .B EFAULT
 A required pointer argument (i.e.,
 .IR uaddr ,