diff --git a/lib/config.js b/lib/config.js
index 0c9b5a6..901b81f 100644
--- a/lib/config.js
+++ b/lib/config.js
@@ -10,11 +10,10 @@ export const loadConfig = async (configPath) => {
     )
   }
 
-  if (typeof config.checksumPrefix === 'undefined') {
-    config.checksumPrefix = 'benthos'
+  return {
+    ...config,
+    checksumPrefix: config.checksumPrefix ?? 'benthos'
   }
-
-  return config
 }
 
 export const loadJson = async (name) => {