diff --git a/runtime/Android.mk b/runtime/Android.mk
index 7f103a4..dd1613e 100644
--- a/runtime/Android.mk
+++ b/runtime/Android.mk
@@ -311,13 +311,14 @@
   dex_instruction.h \
   dex_instruction_utils.h \
   gc_root.h \
-  gc/allocator/rosalloc.h \
-  gc/collector/gc_type.h \
   gc/allocator_type.h \
+  gc/allocator/rosalloc.h \
   gc/collector_type.h \
+  gc/collector/gc_type.h \
+  gc/heap.h \
   gc/space/region_space.h \
   gc/space/space.h \
-  gc/heap.h \
+  gc/weak_root_state.h \
   image.h \
   instrumentation.h \
   indirect_reference_table.h \