diff --git a/ChangeLog b/ChangeLog
index e1dbf36a..acf51e10 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,6 @@
+2009-03-24 Bahadır Kandemir <bahadir@pardus.org.tr>
+        * Allow disabling delta package support from pisi.conf
+
 2009-03-24 Bahadır Kandemir <bahadir@pardus.org.tr>
         * Merged COMAR patch. PiSi now has a cleaner comar interface module.
 
diff --git a/pisi/atomicoperations.py b/pisi/atomicoperations.py
index 496d15ca..29906f19 100644
--- a/pisi/atomicoperations.py
+++ b/pisi/atomicoperations.py
@@ -81,8 +81,12 @@ 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")
+
             # If delta exists than use the delta uri.
-            if delta:
+            if delta and not ignore_delta:
                 pkg_uri = delta.packageURI
                 pkg_hash = delta.packageHash
             else:
diff --git a/pisi/configfile.py b/pisi/configfile.py
index 93faf9ba..1fafec92 100644
--- a/pisi/configfile.py
+++ b/pisi/configfile.py
@@ -75,6 +75,7 @@ class GeneralDefaults:
     package_cache = False
     package_cache_limit = 0
     bandwidth_limit = 0
+    ignore_delta = False
 
 class BuildDefaults:
     """Default values for [build] section"""