diff -r 947560700a09 -r 450d709262c1 src/hotspot/share/runtime/arguments.cpp
--- a/src/hotspot/share/runtime/arguments.cpp	Fri Apr 06 13:55:25 2018 +0200
+++ b/src/hotspot/share/runtime/arguments.cpp	Fri Apr 06 09:59:48 2018 -0400
@@ -96,6 +96,8 @@
 intx   Arguments::_Tier3InvokeNotifyFreqLog     = Tier3InvokeNotifyFreqLog;
 intx   Arguments::_Tier4InvocationThreshold     = Tier4InvocationThreshold;
 
+bool   Arguments::_enable_preview               = false;
+
 char*  Arguments::SharedArchivePath             = NULL;
 
 AgentLibraryList Arguments::_libraryList;
@@ -2739,6 +2741,9 @@
         }
       }
 #endif // !INCLUDE_JVMTI
+    // --enable_preview
+    } else if (match_option(option, "--enable-preview")) {
+      set_enable_preview();
     // -Xnoclassgc
     } else if (match_option(option, "-Xnoclassgc")) {
       if (FLAG_SET_CMDLINE(bool, ClassUnloading, false) != Flag::SUCCESS) {