diff --git a/pisi/atomicoperations.py b/pisi/atomicoperations.py
index 29906f19..c66b84aa 100644
--- a/pisi/atomicoperations.py
+++ b/pisi/atomicoperations.py
@@ -81,9 +81,7 @@ class Install(AtomicOperation):
                 (version, release, build) = installdb.get_version(pkg.name)
                 delta = pkg.get_delta(buildFrom=build)
 
-            # Check if delta is enabled in pisi.conf
-            config = pisi.configfile.ConfigurationFile("/etc/pisi/pisi.conf")
-            ignore_delta = config.get("general", "ignore_delta")
+            ignore_delta = ctx.config.values.general.ignore_delta
 
             # If delta exists than use the delta uri.
             if delta and not ignore_delta:
diff --git a/pisi/operations/helper.py b/pisi/operations/helper.py
index 681cd7c1..24913e14 100644
--- a/pisi/operations/helper.py
+++ b/pisi/operations/helper.py
@@ -87,7 +87,9 @@ def calculate_download_sizes(order):
             (version, release, build) = installdb.get_version(pkg.name)
             delta = pkg.get_delta(buildFrom=build)
 
-        if delta:
+        ignore_delta = ctx.config.values.general.ignore_delta
+
+        if delta and not ignore_delta:
             fn = os.path.basename(delta.packageURI)
             pkg_hash = delta.packageHash
             pkg_size = delta.packageSize