diff --git a/man2/futex.2 b/man2/futex.2
index d4d1e203e..50f858a0d 100644
--- a/man2/futex.2
+++ b/man2/futex.2
@@ -1069,9 +1069,11 @@ The bitset supplied in
 is zero.
 .TP
 .B EINVAL
-.RB ( FUTEX_REQUEUE )
-.\" FIXME tglx suggested adding this, but does this error really
-.\"       occur for FUTEX_REQUEUE?
+.RB ( FUTEX_REQUEUE ,
+.\" FIXME tglx suggested adding this, but does this error really occur for
+.\"       FUTEX_REQUEUE? (The case where it occurs for FUTEX_CMP_REQUEUE_PI
+.\"       is obvious at the start of futex_requeue().)
+.BR FUTEX_CMP_REQUEUE_PI )
 .I uaddr
 equals
 .IR uaddr2