diff --git a/include/ds_string.h b/include/ds_string.h
index 8128be1..993ed0f 100644
--- a/include/ds_string.h
+++ b/include/ds_string.h
@@ -6,6 +6,7 @@
 #pragma once
 
 #include <stddef.h>
+#include <stdint.h>
 #include <stdlib.h>
 #include <string.h>