diff --git a/client/settings.cc b/client/settings.cc
index 121dc124..5e4119e2 100644
--- a/client/settings.cc
+++ b/client/settings.cc
@@ -19,6 +19,7 @@
 #include <limits>
 
 #include "base/logging.h"
+#include "base/notreached.h"
 #include "base/posix/eintr_wrapper.h"
 #include "build/build_config.h"
 #include "util/file/filesystem.h"