diff --git a/download_action.cc b/download_action.cc
index 8508670..8d211ea 100644
--- a/download_action.cc
+++ b/download_action.cc
@@ -13,6 +13,7 @@
 #include <base/strings/stringprintf.h>
 
 #include "update_engine/action_pipe.h"
+#include "update_engine/omaha_request_params.h"
 #include "update_engine/p2p_manager.h"
 #include "update_engine/subprocess.h"
 #include "update_engine/utils.h"