diff --git a/tools/osbuild-mpp b/tools/osbuild-mpp
index eb610be2a..f861ba944 100755
--- a/tools/osbuild-mpp
+++ b/tools/osbuild-mpp
@@ -1673,6 +1673,8 @@ class ManifestFileV2(ManifestFile):
         if not mpp:
             return
 
+        self._process_format(mpp)
+
         refs = element_enter(inputs_images, "references", {})
         manifest_lists = []