diff --git a/pisi/index.py b/pisi/index.py
index 16d29dec..8043be7f 100644
--- a/pisi/index.py
+++ b/pisi/index.py
@@ -165,6 +165,7 @@ class Index(XmlFile):
                     delta = metadata.Delta()
                     delta.packageURI = util.removepathprefix(repo_uri, delta_path)
                     delta.packageSize = os.path.getsize(delta_path)
+                    delta.packageHash = util.sha1_file(delta_path)
                     name, relFrom, relTo = util.parse_delta_package_name(delta_path)
                     delta.releaseFrom = relFrom
                     md.package.deltaPackages.append(delta)
diff --git a/pisi/metadata.py b/pisi/metadata.py
index 9ec3f490..1ab289de 100644
--- a/pisi/metadata.py
+++ b/pisi/metadata.py
@@ -32,6 +32,7 @@ class Delta:
     
     t_PackageURI = [ autoxml.String, autoxml.optional]
     t_PackageSize = [ autoxml.Long, autoxml.optional]
+    t_PackageHash = [ autoxml.String, autoxml.optional, "SHA1Sum" ]
     a_releaseFrom = [autoxml.String, autoxml.optional]
 
 class Source: