diff --git a/base/manifest-schema.json b/base/manifest-schema.json
index 3c9d31f..9d01b29 100644
--- a/base/manifest-schema.json
+++ b/base/manifest-schema.json
@@ -10,7 +10,6 @@
 			"type": "object",
 			"properties": {
 				"mount_dir": { "type": "string" },
-                                "image_file": { "type": "string" },
 				"tarball": { "type": "boolean" },
 				"tarball_dir": { "type": "string" },
 				"mirror":   { "type": "string" }