diff --git a/Lib/zipfile.py b/Lib/zipfile.py
index a50a4583361..e2ede459405 100644
--- a/Lib/zipfile.py
+++ b/Lib/zipfile.py
@@ -1110,7 +1110,7 @@ def writestr(self, zinfo_or_arcname, bytes):
         self.fp.flush()
         if zinfo.flag_bits & 0x08:
             # Write CRC and file sizes after the file data
-            self.fp.write(struct.pack("<lLL", zinfo.CRC, zinfo.compress_size,
+            self.fp.write(struct.pack("<LLL", zinfo.CRC, zinfo.compress_size,
                   zinfo.file_size))
         self.filelist.append(zinfo)
         self.NameToInfo[zinfo.filename] = zinfo
diff --git a/Misc/NEWS b/Misc/NEWS
index 06cd333a3bd..8cbdb19dd9a 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -128,6 +128,9 @@ Library
   makeunicodedata.py and regenerated the Unicode database (This fixes
   u'\u1d79'.lower() == '\x00').
 
+- Issue #1202: zipfile module would cause a DeprecationWarning when storing
+  files with a CRC32 > 2**31-1.
+
 Extension Modules
 -----------------