diff --git a/gen_updates2.py b/gen_updates2.py
index 51056f9..e0bb6c6 100755
--- a/gen_updates2.py
+++ b/gen_updates2.py
@@ -144,7 +144,7 @@ def read_revs_dir(path, args, src=None, ret=None):
                 offs = 0
                 while offs < sz:
                     f.seek(offs, os.SEEK_SET)
-                    hdr = struct.unpack("IiIIIIIIIIII", f.read(48))
+                    hdr = struct.unpack("<IiIIIIIIIIII", f.read(48))
                     ret.append({"path": rp, "src": src or path,
                                 "cpuid": hdr[3], "pf": hdr[6], "rev": hdr[1],
                                 "date": hdr[2], "offs": offs, "cksum": hdr[4],
@@ -152,7 +152,7 @@ def read_revs_dir(path, args, src=None, ret=None):
 
                     if hdr[8] and hdr[8] - hdr[7] > 48:
                         f.seek(hdr[7], os.SEEK_CUR)
-                        ext_tbl = struct.unpack("IIIII", f.read(20))
+                        ext_tbl = struct.unpack("<IIIII", f.read(20))
                         log_status("Found %u extended signatures for %s:%#x" %
                                    (ext_tbl[0], rp, offs), level=1)
 
@@ -160,7 +160,7 @@ def read_revs_dir(path, args, src=None, ret=None):
                         ext_sig_cnt = 0
                         while cur_offs < offs + hdr[8] \
                                 and ext_sig_cnt <= ext_tbl[0]:
-                            ext_sig = struct.unpack("III", f.read(12))
+                            ext_sig = struct.unpack("<III", f.read(12))
                             ignore = args.ignore_ext_dups and \
                                 (ext_sig[0] == hdr[3])
                             if not ignore: