diff --git a/quic/core/quic_types.h b/quic/core/quic_types.h
index fe52a3a..917e880 100644
--- a/quic/core/quic_types.h
+++ b/quic/core/quic_types.h
@@ -17,6 +17,7 @@
 #include "net/third_party/quiche/src/quic/core/quic_time.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_containers.h"
 #include "net/third_party/quiche/src/quic/platform/api/quic_export.h"
+#include "net/third_party/quiche/src/quic/platform/api/quic_flags.h"
 
 namespace quic {