diff --git a/runtime/class_table.h b/runtime/class_table.h
index 219e2c6..c911365 100644
--- a/runtime/class_table.h
+++ b/runtime/class_table.h
@@ -104,6 +104,7 @@
       REQUIRES(Locks::classlinker_classes_lock_)
       SHARED_REQUIRES(Locks::mutator_lock_);
 
+  // Combines all of the tables into one class set.
   size_t WriteToMemory(uint8_t* ptr) const
       REQUIRES(Locks::classlinker_classes_lock_)
       SHARED_REQUIRES(Locks::mutator_lock_);