diff --git a/man2/futex.2 b/man2/futex.2
index 7d816bd1a..fe69f2d4e 100644
--- a/man2/futex.2
+++ b/man2/futex.2
@@ -224,7 +224,7 @@ operation was interrupted by a signal (see
 or a spurious wakeup.
 .TP
 .B EINVAL
-An operation was not defined or there was error in page alignment.
+Invalid argument.
 .TP
 .B ENFILE
 The system limit on the total number of open files has been reached.