diff -r 5ec8aeda451e -r 9d95d8a8b750 src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipFileSystem.java
--- a/src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipFileSystem.java	Mon Oct 28 16:06:08 2019 +0000
+++ b/src/jdk.zipfs/share/classes/jdk/nio/zipfs/ZipFileSystem.java	Mon Oct 28 13:17:54 2019 -0400
@@ -1760,12 +1760,6 @@
         }
 
         @Override
-        public synchronized void write(int b) throws IOException {
-            super.write(b);
-            crc.update(b);
-        }
-
-        @Override
         public synchronized void write(byte[] b, int off, int len)
                 throws IOException {
             super.write(b, off, len);