diff --git a/tasks/task_overlay.c b/tasks/task_overlay.c
index a56c594fa6..3a8f9665c4 100644
--- a/tasks/task_overlay.c
+++ b/tasks/task_overlay.c
@@ -16,6 +16,7 @@
 #include <stdlib.h>
 
 #include <compat/strl.h>
+#include <compat/posix_string.h>
 #include <retro_miscellaneous.h>
 #include <file/file_path.h>
 #include <file/config_file.h>