diff --git a/src/share/classes/java/util/zip/ZipConstants.java b/src/share/classes/java/util/zip/ZipConstants.java
index c91c20ebe1abbd86ba8915112254d4283e245d05..ade50f32fcb6d962058bbca3846454263075ae38 100644
--- a/src/share/classes/java/util/zip/ZipConstants.java
+++ b/src/share/classes/java/util/zip/ZipConstants.java
@@ -68,21 +68,6 @@ interface ZipConstants {
     static final int EXTSIZ = 8;        // compressed size
     static final int EXTLEN = 12;       // uncompressed size
 
-    /*
-     * Extra field header ID
-     */
-    static final int  EXTID_ZIP64 = 0x0001;    // Zip64
-    static final int  EXTID_NTFS  = 0x000a;    // NTFS
-    static final int  EXTID_UNIX  = 0x000d;    // UNIX
-    static final int  EXTID_EXTT  = 0x5455;    // Info-ZIP Extended Timestamp
-
-    /*
-     * EXTT timestamp flags
-     */
-    static final int  EXTT_FLAG_LMT = 0x1;       // LastModifiedTime
-    static final int  EXTT_FLAG_LAT = 0x2;       // LastAccessTime
-    static final int  EXTT_FLAT_CT  = 0x4;       // CreationTime
-
     /*
      * Central directory (CEN) header field offsets
      */
diff --git a/src/share/classes/java/util/zip/ZipConstants64.java b/src/share/classes/java/util/zip/ZipConstants64.java
index f1de2941e29bdcdc9356265158c15b63cb33f461..d44d42ab1323993f2c10b4e2b005b5368750abdd 100644
--- a/src/share/classes/java/util/zip/ZipConstants64.java
+++ b/src/share/classes/java/util/zip/ZipConstants64.java
@@ -80,5 +80,26 @@ class ZipConstants64 {
                                         // comment fields for this file must be
                                         // encoded using UTF-8.
 
+    /*
+     * Constants below are defined here (instead of in ZipConstants)
+     * to avoid being exposed as public fields of ZipFile, ZipEntry,
+     * ZipInputStream and ZipOutputstream.
+     */
+
+    /*
+     * Extra field header ID
+     */
+    static final int  EXTID_ZIP64 = 0x0001;    // Zip64
+    static final int  EXTID_NTFS  = 0x000a;    // NTFS
+    static final int  EXTID_UNIX  = 0x000d;    // UNIX
+    static final int  EXTID_EXTT  = 0x5455;    // Info-ZIP Extended Timestamp
+
+    /*
+     * EXTT timestamp flags
+     */
+    static final int  EXTT_FLAG_LMT = 0x1;       // LastModifiedTime
+    static final int  EXTT_FLAG_LAT = 0x2;       // LastAccessTime
+    static final int  EXTT_FLAT_CT  = 0x4;       // CreationTime
+
     private ZipConstants64() {}
 }
diff --git a/src/share/classes/java/util/zip/ZipEntry.java b/src/share/classes/java/util/zip/ZipEntry.java
index c670f36895fb15602cf74add082ab277fe827ffa..3f958c48816556e20e04781947e2c582c3760d73 100644
--- a/src/share/classes/java/util/zip/ZipEntry.java
+++ b/src/share/classes/java/util/zip/ZipEntry.java
@@ -30,6 +30,8 @@ import java.nio.file.attribute.FileTime;
 import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 
+import static java.util.zip.ZipConstants64.*;
+
 /**
  * This class is used to represent a ZIP file entry.
  *