diff --git a/man2/futex.2 b/man2/futex.2
index d6881c095..63ef8fdd7 100644
--- a/man2/futex.2
+++ b/man2/futex.2
@@ -689,7 +689,6 @@ User space cannot handle this race free.
 .TP
 .BR FUTEX_UNLOCK_PI " (since Linux 2.6.18)"
 .\" commit c87e2837be82df479a6bae9f155c43516d2feebc
-.\" FIXME to complete
 This operation wakes the top priority waiter which is waiting in
 .B FUTEX_LOCK_PI
 on the futex address provided by the
@@ -869,11 +868,15 @@ is invalid.
 .TP
 .B EINVAL
 .RB ( FUTEX_LOCK_PI ,
-.BR FUTEX_TRYLOCK_PI )
+.BR FUTEX_TRYLOCK_PI ,
+.BR FUTEX_UNLOCK_PI )
 The kernel detected an inconsistency between the user-space state at
 .I uaddr
 and the kernel state.
-This indicates either state corruption or that the kernel found a waiter on
+This indicates either state corruption
+.\" FIXME tglx did not mention the "state corruption" for FUTEX_UNLOCK_PI.
+.\"       Does that case also apply for FUTEX_UNLOCK_PI?
+or that the kernel found a waiter on
 .I uaddr
 which is waiting via
 .BR FUTEX_WAIT