diff --git a/pisi/archive.py b/pisi/archive.py
index a0b5db48..574228d3 100644
--- a/pisi/archive.py
+++ b/pisi/archive.py
@@ -19,6 +19,7 @@ import shutil
 import tarfile
 import zipfile
 import gzip
+import struct
 
 import gettext
 __trans = gettext.translation('pisi', fallback=True)
@@ -212,7 +213,23 @@ class MyZipFile(zipfile.ZipFile):
                   "Attempt to read ZIP archive that was already closed"
         zinfo = self.getinfo(name)
         filepos = self.fp.tell()
-        self.fp.seek(zinfo.file_offset, 0)
+
+        self.fp.seek(zinfo.header_offset, 0)
+
+        # Skip the file header:
+        fheader = self.fp.read(30)
+        if fheader[0:4] != zipfile.stringFileHeader:
+            raise BadZipfile, "Bad magic number for file header"
+
+        fheader = struct.unpack(zipfile.structFileHeader, fheader)
+        fname = self.fp.read(fheader[zipfile._FH_FILENAME_LENGTH])
+        if fheader[zipfile._FH_EXTRA_FIELD_LENGTH]:
+            self.fp.read(fheader[zipfile._FH_EXTRA_FIELD_LENGTH])
+
+        if fname != zinfo.orig_filename:
+            raise zipfile.BadZipfile, \
+                  'File name in directory "%s" and header "%s" differ.' % (
+                zinfo.orig_filename, fname)
 
         destfile = file(outname, 'wb')
 
diff --git a/python-2.5.patch b/python-2.5.patch
new file mode 100644
index 00000000..3e161027
--- /dev/null
+++ b/python-2.5.patch
@@ -0,0 +1,38 @@
+Index: pisi/archive.py
+===================================================================
+--- pisi/archive.py	(revision 16476)
++++ pisi/archive.py	(working copy)
+@@ -19,6 +19,7 @@
+ import tarfile
+ import zipfile
+ import gzip
++import struct
+ 
+ import gettext
+ __trans = gettext.translation('pisi', fallback=True)
+@@ -212,8 +213,24 @@
+                   "Attempt to read ZIP archive that was already closed"
+         zinfo = self.getinfo(name)
+         filepos = self.fp.tell()
+-        self.fp.seek(zinfo.file_offset, 0)
+ 
++        self.fp.seek(zinfo.header_offset, 0)
++
++        # Skip the file header:
++        fheader = self.fp.read(30)
++        if fheader[0:4] != zipfile.stringFileHeader:
++            raise BadZipfile, "Bad magic number for file header"
++
++        fheader = struct.unpack(zipfile.structFileHeader, fheader)
++        fname = self.fp.read(fheader[zipfile._FH_FILENAME_LENGTH])
++        if fheader[zipfile._FH_EXTRA_FIELD_LENGTH]:
++            self.fp.read(fheader[zipfile._FH_EXTRA_FIELD_LENGTH])
++
++        if fname != zinfo.orig_filename:
++            raise zipfile.BadZipfile, \
++                  'File name in directory "%s" and header "%s" differ.' % (
++                zinfo.orig_filename, fname)
++
+         destfile = file(outname, 'wb')
+ 
+         if zinfo.compress_type == zipfile.ZIP_STORED: