diff --git a/man7/capabilities.7 b/man7/capabilities.7
index 68ca558b2..7c1976002 100644
--- a/man7/capabilities.7
+++ b/man7/capabilities.7
@@ -127,6 +127,8 @@ set the set-group-ID bit for a file whose GID does not match
 the file system or any of the supplementary GIDs of the calling process.
 .TP
 .B CAP_IPC_LOCK
+.\" FIXME As at Linux 3.2, there are some strange uses of this capability
+.\" in other places; they probably should be replaced with something else.
 Lock memory
 .RB ( mlock (2),
 .BR mlockall (2),