diff --git a/tests/test_oscompat.c b/tests/test_oscompat.c
index 189adbfb..2e48852d 100644
--- a/tests/test_oscompat.c
+++ b/tests/test_oscompat.c
@@ -6,6 +6,7 @@
 #include <setjmp.h>
 #include <stdarg.h>
 #include <stddef.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>