diff --git a/stackrc b/stackrc
index f42bd944fa..4fefe8da30 100644
--- a/stackrc
+++ b/stackrc
@@ -712,7 +712,7 @@ S3_SERVICE_PORT=${S3_SERVICE_PORT:-3333}
 PRIVATE_NETWORK_NAME=${PRIVATE_NETWORK_NAME:-"private"}
 PUBLIC_NETWORK_NAME=${PUBLIC_NETWORK_NAME:-"public"}
 
-PUBLIC_INTERFACE=""
+PUBLIC_INTERFACE=${PUBLIC_INTERFACE:-""}
 
 # Set default screen name
 SCREEN_NAME=${SCREEN_NAME:-stack}