diff --git a/tokenizer/base64.h b/tokenizer/base64.h
index 12b8703a8..946660d25 100644
--- a/tokenizer/base64.h
+++ b/tokenizer/base64.h
@@ -28,6 +28,7 @@
 #include <cstdint>
 #include <string>
 #include <string_view>
+#include <cstdint>
 
 namespace base64 {