diff --git a/man3/adjtime.3 b/man3/adjtime.3
index 60db8ecd6..8aab7aabe 100644
--- a/man3/adjtime.3
+++ b/man3/adjtime.3
@@ -111,6 +111,20 @@ Under Linux the
 capability is required.
 .SH CONFORMING TO
 4.3BSD, System V.
+.SH BUGS
+Currently, if
+.I delta
+is specified as NULL, 
+no valid information about the outstanding clock adjustment is returned in
+.IR olddelta .
+(In this circumstance, 
+.BR adjtime ()
+should return the outstanding clock adjustment, without changing it.)
+This is the result of a kernel limitation.
+.\" FIXME .
+.\" A kernel bug report has been submitted; check later to see if 
+.\" things are resolved.
+.\" http://bugzilla.kernel.org/show_bug.cgi?id=6761
 .SH "SEE ALSO"
 .BR adjtimex (2),
 .BR gettimeofday (2),