AVL: creation, destroy, add
diff --git a/binding.gyp b/binding.gyp
index 1883f73..ff2d794 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -97,6 +97,7 @@
         'src/core/profiling/basic_timers.c',
         'src/core/profiling/stap_timers.c',
         'src/core/support/alloc.c',
+        'src/core/support/avl.c',
         'src/core/support/cmdline.c',
         'src/core/support/cpu_iphone.c',
         'src/core/support/cpu_linux.c',