diff --git a/update_attempter_unittest.cc b/update_attempter_unittest.cc
index 240e4ec..dd61fa5 100644
--- a/update_attempter_unittest.cc
+++ b/update_attempter_unittest.cc
@@ -22,6 +22,7 @@
 
 #include <base/files/file_util.h>
 #include <base/message_loop/message_loop.h>
+#include <brillo/bind_lambda.h>
 #include <brillo/message_loops/base_message_loop.h>
 #include <brillo/message_loops/message_loop.h>
 #include <brillo/message_loops/message_loop_utils.h>