diff --git a/pisi/atomicoperations.py b/pisi/atomicoperations.py
index 06e82bee..6d480f53 100644
--- a/pisi/atomicoperations.py
+++ b/pisi/atomicoperations.py
@@ -79,8 +79,10 @@ class Install(AtomicOperation):
             installdb = pisi.db.installdb.InstallDB()
             # Package is installed. This is an upgrade. Check delta.
             if installdb.has_package(pkg.name):
-                (version, release, build) = installdb.get_version(pkg.name)
-                delta = pkg.get_delta(buildFrom=build)
+                (version, release, build, distro, distro_release) = installdb.get_version_and_distro_release(pkg.name)
+                # pisi distro upgrade should not use delta support
+                if distro == pkg.distro and distro_release == pkg.distributionRelease:
+                    delta = pkg.get_delta(buildFrom=build)
 
             ignore_delta = ctx.config.values.general.ignore_delta
 
diff --git a/pisi/operations/helper.py b/pisi/operations/helper.py
index 24913e14..d889392c 100644
--- a/pisi/operations/helper.py
+++ b/pisi/operations/helper.py
@@ -84,8 +84,10 @@ def calculate_download_sizes(order):
 
         delta = None
         if installdb.has_package(pkg.name):
-            (version, release, build) = installdb.get_version(pkg.name)
-            delta = pkg.get_delta(buildFrom=build)
+            (version, release, build, distro, distro_release) = installdb.get_version_and_distro_release(pkg.name)
+            # pisi distro upgrade should not use delta support
+            if distro == pkg.distro and distro_release == pkg.distributionRelease:
+                delta = pkg.get_delta(buildFrom=build)
 
         ignore_delta = ctx.config.values.general.ignore_delta