--- old/src/cpu/x86/vm/frame_x86.cpp	2017-06-26 12:31:07.270080829 -0400
+++ new/src/cpu/x86/vm/frame_x86.cpp	2017-06-26 12:31:06.674077874 -0400
@@ -642,6 +642,7 @@
     DESCRIBE_FP_OFFSET(interpreter_frame_mirror);
     DESCRIBE_FP_OFFSET(interpreter_frame_mdp);
     DESCRIBE_FP_OFFSET(interpreter_frame_cache);
+    DESCRIBE_FP_OFFSET(interpreter_frame_vt_alloc_ptr);
     DESCRIBE_FP_OFFSET(interpreter_frame_locals);
     DESCRIBE_FP_OFFSET(interpreter_frame_bcp);
     DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp);