--- a/hotspot/src/share/vm/runtime/arguments.cpp	Sat May 05 10:24:55 2012 -0400
+++ b/hotspot/src/share/vm/runtime/arguments.cpp	Fri May 11 11:30:03 2012 -0700
@@ -3039,7 +3039,7 @@
     return result;
   }
 
-#ifdef JAVASE_EMBEDDED
+#if (defined JAVASE_EMBEDDED || defined ARM)
   UNSUPPORTED_OPTION(UseG1GC, "G1 GC");
 #endif