diff --git a/extensions/browser/extension_dialog_auto_confirm.cc b/extensions/browser/extension_dialog_auto_confirm.cc
index adb4ac3f9..be8b161bc 100644
--- a/extensions/browser/extension_dialog_auto_confirm.cc
+++ b/extensions/browser/extension_dialog_auto_confirm.cc
@@ -4,6 +4,7 @@
 
 #include "extensions/browser/extension_dialog_auto_confirm.h"
 
+#include <cstring>
 #include <utility>
 
 #include "base/check.h"