diff --git a/include/mapnik/wkb.hpp b/include/mapnik/wkb.hpp
index fc32a9f..482496a 100644
--- a/include/mapnik/wkb.hpp
+++ b/include/mapnik/wkb.hpp
@@ -27,6 +27,7 @@
 #include <mapnik/config.hpp>
 #include <mapnik/geometry.hpp>
 #include <mapnik/util/noncopyable.hpp>
+#include <cstdint>
 
 namespace mapnik
 {