diff --git a/chrome/browser/login_detection/oauth_login_detector.h b/chrome/browser/login_detection/oauth_login_detector.h
index 6844529c7..c0c3b185f 100644
--- a/chrome/browser/login_detection/oauth_login_detector.h
+++ b/chrome/browser/login_detection/oauth_login_detector.h
@@ -7,6 +7,7 @@
 
 #include <set>
 #include <string>
+#include <vector>
 
 #include "third_party/abseil-cpp/absl/types/optional.h"
 #include "url/gurl.h"