Index: modules/luni/src/main/java/java/io/ObjectStreamClass.java =================================================================== --- modules/luni/src/main/java/java/io/ObjectStreamClass.java (revision 438870) +++ modules/luni/src/main/java/java/io/ObjectStreamClass.java (working copy) @@ -538,7 +538,7 @@ * */ private static String descriptorForSignature(String signature) { - return signature.substring(signature.indexOf("(")); //$NON-NLS-1$ + return signature.substring(signature.indexOf("(")).replace('.', '/'); //$NON-NLS-1$ } /**