diff --git a/compiler/linker/vector_output_stream.cc b/compiler/linker/vector_output_stream.cc
index f758005..75f90e5 100644
--- a/compiler/linker/vector_output_stream.cc
+++ b/compiler/linker/vector_output_stream.cc
@@ -19,6 +19,7 @@
 #include "base/logging.h"
 
 namespace art {
+namespace linker {
 
 VectorOutputStream::VectorOutputStream(const std::string& location, std::vector<uint8_t>* vector)
     : OutputStream(location), offset_(vector->size()), vector_(vector) {}
@@ -45,4 +46,5 @@
   return offset_;
 }
 
+}  // namespace linker
 }  // namespace art