diff --git a/packages/atchops/tests/test_aes_ctr.c b/packages/atchops/tests/test_aes_ctr.c
index 650de3e5..7af8559a 100644
--- a/packages/atchops/tests/test_aes_ctr.c
+++ b/packages/atchops/tests/test_aes_ctr.c
@@ -1,6 +1,8 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <stddef.h>
+#include <stdint.h>
 #include "atchops/aes_ctr.h"
 
 void printx(const unsigned char *str, size_t len)