diff --git a/src/ox/fs/oxfstool.cpp b/src/ox/fs/oxfstool.cpp
index d306f12c6..b3c7afc95 100644
--- a/src/ox/fs/oxfstool.cpp
+++ b/src/ox/fs/oxfstool.cpp
@@ -5,6 +5,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  */
+#include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <ox/std/strops.hpp>