diff --git a/tools/bt.hpp b/tools/bt.hpp
index 10050b6..d4710ce 100644
--- a/tools/bt.hpp
+++ b/tools/bt.hpp
@@ -3,6 +3,9 @@
 #include "blob_interface.hpp"
 #include "interface.hpp"
 
+namespace host_tool
+{
+
 class BtDataHandler : public DataInterface
 {
   public:
@@ -19,3 +22,5 @@
     blobs::FirmwareBlobHandler::UpdateFlags flags =
         blobs::FirmwareBlobHandler::UpdateFlags::ipmi;
 };
+
+} // namespace host_tool