diff --git a/compiler/optimizing/ssa_liveness_analysis_test.cc b/compiler/optimizing/ssa_liveness_analysis_test.cc
index a477893..2df0f34 100644
--- a/compiler/optimizing/ssa_liveness_analysis_test.cc
+++ b/compiler/optimizing/ssa_liveness_analysis_test.cc
@@ -20,12 +20,13 @@
 #include "arch/instruction_set_features.h"
 #include "base/arena_allocator.h"
 #include "base/arena_containers.h"
+#include "base/macros.h"
 #include "code_generator.h"
 #include "driver/compiler_options.h"
 #include "nodes.h"
 #include "optimizing_unit_test.h"
 
-namespace art {
+namespace art HIDDEN {
 
 class SsaLivenessAnalysisTest : public OptimizingUnitTest {
  protected: