diff --git a/charts/cf-common/templates/classic/_env_var_secret_ref.tpl b/charts/cf-common/templates/classic/_env_var_secret_ref.tpl
index a5435b9..534c2cc 100644
--- a/charts/cf-common/templates/classic/_env_var_secret_ref.tpl
+++ b/charts/cf-common/templates/classic/_env_var_secret_ref.tpl
@@ -81,6 +81,24 @@ New secret implementation
   {{- end }}
 {{- end }}
 
+{{- /*
+MONGO_URI env var value
+*/}}
+{{- define "cf-common-0.18.2.classic.mongo-uri-archive-env-var-value" }}
+{{- /*
+Check for legacy global.mongoURI
+*/}}
+  {{- if if or .Values.global.mongoURIArchive .Values.global.mongoURI }}
+{{- print "$(MONGO_URI_ARCHIVE)" }}
+{{- /*
+New secret implementation
+*/}}
+  {{- else }}
+{{- print "$(MONGODB_PROTOCOL)://$(MONGODB_USER):$(MONGODB_PASSWORD)@$(MONGODB_HOST)/$(MONGODB_DATABASE_ARCHIVE)?$(MONGODB_OPTIONS)" }}
+  {{- end }}
+{{- end }}
+
+
 {{- /*
 REDIS_URL env var secret name
 */}}