diff --git a/arbor/include/arbor/common_types.hpp b/arbor/include/arbor/common_types.hpp
index de9dc376d610b09acd4f990b6ecb83e5ea766d6b..d756467e42291c7e4fd599d9911bf56a927eff6a 100644
--- a/arbor/include/arbor/common_types.hpp
+++ b/arbor/include/arbor/common_types.hpp
@@ -6,6 +6,7 @@
  */
 
 #include <cstddef>
+#include <cstdint>
 #include <functional>
 #include <limits>
 #include <iosfwd>