diff --git a/compiler/optimizing/induction_var_analysis.h b/compiler/optimizing/induction_var_analysis.h
index 0941772..124c3b4 100644
--- a/compiler/optimizing/induction_var_analysis.h
+++ b/compiler/optimizing/induction_var_analysis.h
@@ -21,11 +21,12 @@
 
 #include "base/arena_containers.h"
 #include "base/array_ref.h"
+#include "base/macros.h"
 #include "base/scoped_arena_containers.h"
 #include "nodes.h"
 #include "optimization.h"
 
-namespace art {
+namespace art HIDDEN {
 
 /**
  * Induction variable analysis. This class does not have a direct public API.