diff --git a/man2/futex.2 b/man2/futex.2
index 47884c396..4a517f30d 100644
--- a/man2/futex.2
+++ b/man2/futex.2
@@ -649,11 +649,18 @@ The owner inherits either the priority or the bandwidth of the waiter.
 This inheritance follows the lock chain in the case of
 nested locking and performs deadlock detection.
 
+.\" FIXME tglx says "The timeout argument is handled as described in
+.\"       FUTEX_WAIT." However, it appears to me that this is not right.
+.\"       Is the following formulation correct.
 The
 .I timeout
-.\" FIXME Is this true??????????????????????
-argument is handled as described in
-.BR FUTEX_WAIT .
+argument provides a timeout for the lock attempt.
+It is interpreted as an absolute time, measured against the
+.BR CLOCK_REALTIME
+clock.
+If
+.I timeout
+is NULL, the operation will block indefinitely.
 
 The
 .IR uaddr2 ,