diff --git a/scripts/imagebuilder.py b/scripts/imagebuilder.py
index 1c94f88..3bc4947 100755
--- a/scripts/imagebuilder.py
+++ b/scripts/imagebuilder.py
@@ -828,6 +828,7 @@
                             self.preexisting.append({
                                     'id': pe_image['Id'],
                                     'tags': raw_tags,
+                                    'base': image.name.split(":")[0],
                                 })
 
                             image.image_id = pe_image['Id']