diff --git a/man2/futex.2 b/man2/futex.2
index a6055bde5..5afe7d49f 100644
--- a/man2/futex.2
+++ b/man2/futex.2
@@ -775,8 +775,8 @@ Returns the number of processes woken up.
 Returns 0 if the futex was successfully locked.
 .TP
 .B FUTEX_TRYLOCK_PI
-.\" FIXME
-[TBC]
+.\" FIXME Is the following correct?
+Returns 0 if the futex was successfully locked.
 .TP
 .B FUTEX_UNLOCK_PI
 .\" FIXME