diff --git a/compiler/linker/vector_output_stream.h b/compiler/linker/vector_output_stream.h
index a9b93e7..92caf59 100644
--- a/compiler/linker/vector_output_stream.h
+++ b/compiler/linker/vector_output_stream.h
@@ -24,6 +24,7 @@
 #include <vector>
 
 namespace art {
+namespace linker {
 
 class VectorOutputStream FINAL : public OutputStream {
  public:
@@ -64,6 +65,7 @@
   DISALLOW_COPY_AND_ASSIGN(VectorOutputStream);
 };
 
+}  // namespace linker
 }  // namespace art
 
 #endif  // ART_COMPILER_LINKER_VECTOR_OUTPUT_STREAM_H_