diff --git a/man2/semop.2 b/man2/semop.2
index f2dd81928..bde95e046 100644
--- a/man2/semop.2
+++ b/man2/semop.2
@@ -465,6 +465,15 @@ is specified for a semaphore operation).
 Linux adopts a third approach: decreasing the semaphore value
 as far as possible (i.e., to zero) and allowing process
 termination to proceed immediately.
+
+In kernels 2.6.x, x <= 10, there is a bug that in some circumstances 
+prevents a process that is waiting for a semaphore value to become 
+zero from being woken up when the value does actually become zero.
+This bug is fixed in kernel 2.6.11.
+.\" The bug report:
+.\" http://marc.theaimsgroup.com/?l=linux-kernel&m=110260821123863&w=2
+.\" the fix:
+.\" http://marc.theaimsgroup.com/?l=linux-kernel&m=110261701025794&w=2
 .SH "CONFORMING TO"
 SVr4, SVID.  SVr4 documents additional error conditions EINVAL, EFBIG,
 ENOSPC.