diff --git a/functions-common b/functions-common
index 39c1bfc..fc17d42 100644
--- a/functions-common
+++ b/functions-common
@@ -47,7 +47,7 @@
 STACK_ENV_VARS="BASE_SQL_CONN DATA_DIR DEST ENABLED_SERVICES HOST_IP \
     KEYSTONE_AUTH_PROTOCOL KEYSTONE_AUTH_URI KEYSTONE_SERVICE_URI \
     LOGFILE OS_CACERT SERVICE_HOST SERVICE_PROTOCOL STACK_USER TLS_IP \
-    HOST_IPV6"
+    HOST_IPV6 SERVICE_IP_VERSION"
 
 
 # Saves significant environment variables to .stackenv for later use