diff --git a/osc/util/cpio.py b/osc/util/cpio.py
index 4a97cf5a..021a5d2e 100644
--- a/osc/util/cpio.py
+++ b/osc/util/cpio.py
@@ -147,16 +147,6 @@ class CpioRead:
     def read(self):
         if not self.__file:
             self.__file = open(self.filename, 'rb')
-            try:
-                if sys.platform[:3] != 'win':
-                    self.__file = mmap.mmap(self.__file.fileno(), os.path.getsize(self.__file.name), prot = mmap.PROT_READ)
-                else:
-                    self.__file = mmap.mmap(self.__file.fileno(), os.path.getsize(self.__file.name))
-            except EnvironmentError as e:
-                if e.errno == 19 or ( hasattr(e, 'winerror') and e.winerror == 5 ):
-                    print('cannot use mmap to read the file, failing back to default', file=sys.stderr)
-                else:
-                    raise e
         else:
             self.__file.seek(0, os.SEEK_SET)
         self._init_datastructs()