--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/main/Arguments.java	Mon Dec 04 10:13:58 2017 +0100
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/main/Arguments.java	Mon Dec 04 17:54:49 2017 +0000
@@ -54,6 +54,7 @@
 import com.sun.tools.doclint.DocLint;
 import com.sun.tools.javac.code.Lint.LintCategory;
 import com.sun.tools.javac.code.Source;
+import com.sun.tools.javac.code.Source.Feature;
 import com.sun.tools.javac.file.BaseFileManager;
 import com.sun.tools.javac.file.JavacFileManager;
 import com.sun.tools.javac.jvm.Profile;