diff --git a/src/utils.hh b/src/utils.hh
index 57a3e126..e99d8dd8 100644
--- a/src/utils.hh
+++ b/src/utils.hh
@@ -6,6 +6,7 @@
 #include <optional>
 #include <string_view>
 
+#include <cstdint>
 #include <iterator>
 #include <memory>
 #include <string>