diff --git a/src/cas/os/posixRT/README b/src/cas/os/posixRT/README
index bade9fe35..827f4dac2 100644
--- a/src/cas/os/posixRT/README
+++ b/src/cas/os/posixRT/README
@@ -1,4 +1,5 @@
 
+WORK IN PROGRESS
 
 this directory contains the posix real time os dependent source for 
 the EPICS ca server