diff --git a/jdk/src/share/classes/java/security/CodeSigner.java b/jdk/src/share/classes/java/security/CodeSigner.java
index 204f71970db..75a9df9d24b 100644
--- a/jdk/src/share/classes/java/security/CodeSigner.java
+++ b/jdk/src/share/classes/java/security/CodeSigner.java
@@ -25,7 +25,7 @@
 
 package java.security;
 
-import java.io.Serializable;
+import java.io.*;
 import java.security.cert.CRL;
 import java.security.cert.CertPath;
 import sun.misc.JavaSecurityCodeSignerAccess;
@@ -205,4 +205,10 @@ public final class CodeSigner implements Serializable {
         });
     }
 
+    // Explicitly reset hash code value to -1
+    private void readObject(ObjectInputStream ois)
+        throws IOException, ClassNotFoundException {
+     ois.defaultReadObject();
+     myhash = -1;
+    }
 }
diff --git a/jdk/src/share/classes/java/security/Timestamp.java b/jdk/src/share/classes/java/security/Timestamp.java
index f9bb77cd19d..1629d9bbff9 100644
--- a/jdk/src/share/classes/java/security/Timestamp.java
+++ b/jdk/src/share/classes/java/security/Timestamp.java
@@ -25,7 +25,7 @@
 
 package java.security;
 
-import java.io.Serializable;
+import java.io.*;
 import java.security.cert.Certificate;
 import java.security.cert.CertPath;
 import java.security.cert.X509Extension;
@@ -153,4 +153,11 @@ public final class Timestamp implements Serializable {
         sb.append(")");
         return sb.toString();
     }
+
+    // Explicitly reset hash code value to -1
+    private void readObject(ObjectInputStream ois)
+        throws IOException, ClassNotFoundException {
+     ois.defaultReadObject();
+     myhash = -1;
+    }
 }
diff --git a/jdk/src/share/native/sun/security/ec/ECC_JNI.cpp b/jdk/src/share/native/sun/security/ec/ECC_JNI.cpp
index 1ddc5853368..a810cd8db28 100644
--- a/jdk/src/share/native/sun/security/ec/ECC_JNI.cpp
+++ b/jdk/src/share/native/sun/security/ec/ECC_JNI.cpp
@@ -89,7 +89,7 @@ JNICALL Java_sun_security_ec_ECKeyPairGenerator_generateECKeyPair
     // Fill a new ECParams using the supplied OID
     if (EC_DecodeParams(&params_item, &ecparams, 0) != SECSuccess) {
         /* bad curve OID */
-        ThrowException(env, INVALID_ALGORITHM_PARAMETER_EXCEPTION);
+        ThrowException(env, (char *) INVALID_ALGORITHM_PARAMETER_EXCEPTION);
         goto cleanup;
     }
 
@@ -101,7 +101,7 @@ JNICALL Java_sun_security_ec_ECKeyPairGenerator_generateECKeyPair
     // Generate the new keypair (using the supplied seed)
     if (EC_NewKey(ecparams, &privKey, (unsigned char *) pSeedBuffer,
         jSeedLength, 0) != SECSuccess) {
-        ThrowException(env, KEY_EXCEPTION);
+        ThrowException(env, (char *) KEY_EXCEPTION);
         goto cleanup;
     }
 
diff --git a/jdk/test/java/security/CodeSigner/Serialize.java b/jdk/test/java/security/CodeSigner/Serialize.java
new file mode 100644
index 00000000000..9a1f9fca97e
--- /dev/null
+++ b/jdk/test/java/security/CodeSigner/Serialize.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @bug 6799854
+ * @summary CodeSigner.hashCode() does not work with serialization
+ */
+
+import java.io.*;
+import java.security.CodeSigner;
+import java.security.Timestamp;
+import java.security.cert.*;
+import java.util.Collections;
+import java.util.Date;
+
+public class Serialize {
+
+    public static void main(String[] args) throws Exception {
+
+        // Create a certpath consisting of one certificate
+        File f = new File(System.getProperty("test.src", "."), "cert_file");
+        FileInputStream fis = new FileInputStream(f);
+        CertificateFactory cf = CertificateFactory.getInstance("X.509");
+        Certificate c = cf.generateCertificate(fis);
+        fis.close();
+        CertPath cp = cf.generateCertPath(Collections.singletonList(c));
+
+        // Create a code signer
+        CodeSigner cs = new CodeSigner(cp, new Timestamp(new Date(), cp));
+
+        // Serialize the code signer
+        ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
+        ObjectOutputStream out = new ObjectOutputStream(byteOut);
+        out.writeObject(cs);
+        out.close();
+
+        // Deserialize the code signer
+        byte[] data = byteOut.toByteArray();
+        CodeSigner cs2 = (CodeSigner) new ObjectInputStream(
+            new ByteArrayInputStream(data)).readObject();
+
+        // Test for equality
+        if (!cs.equals(cs2) || cs.hashCode() != cs2.hashCode()) {
+            throw new Exception("CodeSigner serialization test FAILED");
+        }
+    }
+}
diff --git a/jdk/test/java/security/CodeSigner/cert_file b/jdk/test/java/security/CodeSigner/cert_file
new file mode 100644
index 00000000000..42af97b3762
Binary files /dev/null and b/jdk/test/java/security/CodeSigner/cert_file differ