diff --git a/compose.mssql.yml b/compose.mssql.yml
index b45fc5d..6699956 100644
--- a/compose.mssql.yml
+++ b/compose.mssql.yml
@@ -1,5 +1,7 @@
 version: "3.8"
 services:
   app:
+    environment:
+      - MSSQL_ENABLED
     ports:
       - "1433:1433"