diff --git a/compiler/optimizing/code_generator_arm64.cc b/compiler/optimizing/code_generator_arm64.cc
index 8e862e8..3a2988f 100644
--- a/compiler/optimizing/code_generator_arm64.cc
+++ b/compiler/optimizing/code_generator_arm64.cc
@@ -50,7 +50,7 @@
 #error "ARM64 Codegen VIXL macro-assembler macro already defined."
 #endif
 
-namespace art HIDDEN {
+namespace art {
 
 template<class MirrorType>
 class GcRoot;