diff --git a/native/factor.h b/native/factor.h
index 9e01dc2db1..6b32cf22b5 100644
--- a/native/factor.h
+++ b/native/factor.h
@@ -56,6 +56,7 @@ CELL cs_bot;
 #include <stdbool.h>
 #include <setjmp.h>
 #include <signal.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>