diff --git a/nx/source/services/set.c b/nx/source/services/set.c
index 6bf4b5c7..0bf26876 100644
--- a/nx/source/services/set.c
+++ b/nx/source/services/set.c
@@ -5,6 +5,8 @@
  * @author yellows8
  * @copyright libnx Authors
  */
+#include <string.h>
+
 #include "types.h"
 #include "result.h"
 #include "arm/atomics.h"