diff --git a/include/asterisk/dahdi_compat.h b/include/asterisk/dahdi_compat.h
index efb88372a0..2270237cd5 100644
--- a/include/asterisk/dahdi_compat.h
+++ b/include/asterisk/dahdi_compat.h
@@ -118,6 +118,7 @@
 #define DAHDI_ONHOOKTRANSFER ZT_ONHOOKTRANSFER
 #define dahdi_params zt_params
 #define DAHDI_POLICY_IMMEDIATE ZT_POLICY_IMMEDIATE
+#define DAHDI_POLICY_WHEN_FULL ZT_POLICY_WHEN_FULL
 #define DAHDI_PRI ZT_PRI
 #define DAHDI_RING ZT_RING
 #define DAHDI_RINGOFF ZT_RINGOFF