diff --git a/packages/netlify-cms-core/src/constants/configSchema.js b/packages/netlify-cms-core/src/constants/configSchema.js
index 2648eb53..51b6367a 100644
--- a/packages/netlify-cms-core/src/constants/configSchema.js
+++ b/packages/netlify-cms-core/src/constants/configSchema.js
@@ -48,7 +48,7 @@ const getConfigSchema = () => ({
     },
     publish_mode: {
       type: 'string',
-      enum: ['editorial_workflow'],
+      enum: ['simple', 'editorial_workflow'],
       examples: ['editorial_workflow'],
     },
     slug: {