diff --git a/deps/v8/src/i18n.cc b/deps/v8/src/i18n.cc
index 79a70daf623cdc..d96fd45b2aa8af 100644
--- a/deps/v8/src/i18n.cc
+++ b/deps/v8/src/i18n.cc
@@ -32,6 +32,7 @@
 #include "unicode/ucol.h"
 #include "unicode/ucurr.h"
 #include "unicode/unum.h"
+#include "unicode/ustring.h"
 #include "unicode/uvernum.h"
 #include "unicode/uversion.h"