diff --git a/core/src/webui-proxy/director_connection.h b/core/src/webui-proxy/director_connection.h
index a6fef46..2de5f9f 100644
--- a/core/src/webui-proxy/director_connection.h
+++ b/core/src/webui-proxy/director_connection.h
@@ -50,6 +50,7 @@
 #include <cstddef>
 #include <functional>
 #include <string>
+#include <cstdint>
 #include <string_view>
 
 struct ssl_ctx_st;