diff --git a/definitions/staging/stg_calls.sqlx b/definitions/staging/stg_calls.sqlx
index fbb231c..1d90477 100644
--- a/definitions/staging/stg_calls.sqlx
+++ b/definitions/staging/stg_calls.sqlx
@@ -52,7 +52,7 @@ select DAY_OF_WEEK,
         DISPOSITION_GROUP_B,
         DISPOSITION_GROUP_C,
         DISPOSITION_PATH,
-        DNIS,
+        COALESCE(DNIS, '0') AS DNIS,
         DNIS_AREA_CODE,
         DNIS_COUNTRY,
         DNIS_COUNTRY_CODE,