diff --git a/packages/vaex-core/src/string_utils.hpp b/packages/vaex-core/src/string_utils.hpp
index 66af06c69..7d8493974 100644
--- a/packages/vaex-core/src/string_utils.hpp
+++ b/packages/vaex-core/src/string_utils.hpp
@@ -1,4 +1,5 @@
 /* regex match/search using string_view */
+#include <cstdint>
 #include <nonstd/string_view.hpp>
 #include <regex>
 #include <cstdint>