diff --git a/src/types.h b/src/types.h
index 50b0afec..776dcd9d 100644
--- a/src/types.h
+++ b/src/types.h
@@ -19,6 +19,7 @@
 
 #include <string>
 #include <vector>
+#include <cstdint>
 
 namespace au {