diff --git a/openpkg/rpmrc b/openpkg/rpmrc
index e0785962ac..84cf2b6962 100644
--- a/openpkg/rpmrc
+++ b/openpkg/rpmrc
@@ -128,10 +128,12 @@ os_compat:          FreeBSD4.3: freebsd4.3 freebsd4.2 freebsd4.1 freebsd4.0 linu
 os_compat:          FreeBSD5.0: freebsd5.0 freebsd4.3 freebsd4.2 freebsd4.1 freebsd4.0 linux2.0 linux2.2
 
 #   Tru64
+buildostranslate:   osf15.0:    osf5.0
 buildostranslate:   OSF1V5.0:   osf5.0
 buildostranslate:   OSF1V5.1:   osf5.1
 os_canon:           osf5.0:     osf5.0 9
 os_canon:           osf5.1:     osf5.1 9
+os_compat:          osf15.0:    osf5.0
 os_compat:          OSF1V5.0:   osf5.0
 os_compat:          OSF1V5.1:   osf5.0 osf5.1