diff -r a761a0b2897c -r fd97b0f6abcc langtools/src/jdk.jshell/share/classes/jdk/jshell/TaskFactory.java
--- a/langtools/src/jdk.jshell/share/classes/jdk/jshell/TaskFactory.java	Mon Nov 16 17:10:23 2015 -0800
+++ b/langtools/src/jdk.jshell/share/classes/jdk/jshell/TaskFactory.java	Thu Nov 19 13:23:32 2015 -0800
@@ -80,7 +80,7 @@
         if (compiler == null) {
             throw new UnsupportedOperationException("Compiler not available, must be run with full JDK 9.");
         }
-        if (!System.getProperty("java.specification.version").equals("1.9"))  {
+        if (!System.getProperty("java.specification.version").equals("9"))  {
             throw new UnsupportedOperationException("Wrong compiler, must be run with full JDK 9.");
         }
         this.fileManager = new MemoryFileManager(