--- old/make/data/charsetmapping/charsets	2018-11-30 16:43:11 +0000
+++ new/make/data/charsetmapping/charsets	2018-11-30 16:43:10 +0000
@@ -1554,10 +1554,11 @@
 
 charset x-IBM964 IBM964
     package sun.nio.cs.ext
-    type    source
+    type    template
     alias   cp964               # JDK historical
     alias   ibm964
     alias   ibm-964
+    alias   ibm-euctw
     alias   964
 
 charset x-IBM33722 IBM33722
@@ -1861,6 +1862,11 @@
     minmax  0x21 0x7e 0x21 0x7e
     internal true               # "internal implementation
 
+charset SimpleEUCEncoder SimpleEUCEncoder
+    package sun.nio.cs.ext
+    type    template
+    internal true
+
 ########################################################
 #
 # platform specific charsets, to be registered into spi