diff --git a/values/common-values.yaml b/values/common-values.yaml
index a031459f..5551d849 100644
--- a/values/common-values.yaml
+++ b/values/common-values.yaml
@@ -92,6 +92,11 @@ mattermostApp:
         secretKeyRef:
           key: MM_PLUGINSETTINGS_ENABLEUPLOADS
           name: "mattermost-config"
+    - name: MM_SQLSETTINGS_DATASOURCE
+      valueFrom:
+        secretKeyRef:
+          key: db_connection_string
+          name: "mattermost-postgres"
   securityContext:
     runAsUser: 2000
     runAsGroup: 2000