diff --git a/man2/keyctl.2 b/man2/keyctl.2
index a9cda3721..f448cc518 100644
--- a/man2/keyctl.2
+++ b/man2/keyctl.2
@@ -561,6 +561,11 @@ The descriptive string is written with the following format:
 In particular, the
 .IR description
 field will not contain semicolons;
+.\" FIXME But, the kernel does not enforce the requirement
+.\" that the key description contains no semicolons!
+.\" So, user space has no guarantee here??
+.\" Either something more needs to be said here,
+.\" or a kernel fix is required.
 it should be parsed by working backwards from the end of the string
 to find the last semicolon.
 This allows future semicolon-delimited fields to be inserted