diff --git a/ext/include/opentelemetry/ext/http/common/url_parser.h b/ext/include/opentelemetry/ext/http/common/url_parser.h
index 2ac6d00..b85bf37 100644
--- a/ext/include/opentelemetry/ext/http/common/url_parser.h
+++ b/ext/include/opentelemetry/ext/http/common/url_parser.h
@@ -3,6 +3,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <string>
 #include <vector>
 #include "opentelemetry/nostd/string_view.h"