--- old/src/java.base/share/classes/sun/nio/cs/US_ASCII.java	2015-10-30 14:03:50.283309765 -0700
+++ new/src/java.base/share/classes/sun/nio/cs/US_ASCII.java	2015-10-30 14:03:50.035310703 -0700
@@ -146,6 +146,10 @@
             }
             return dp;
         }
+
+        public boolean isASCIICompatible() {
+            return true;
+        }
     }
 
     private static class Encoder extends CharsetEncoder
@@ -259,6 +263,10 @@
             }
             return dp;
         }
+
+        public boolean isASCIICompatible() {
+            return true;
+        }
     }
 
 }