diff --git a/kernel/include/sortix/initrd.h b/kernel/include/sortix/initrd.h
index c6a47b3e..49ccc3f2 100644
--- a/kernel/include/sortix/initrd.h
+++ b/kernel/include/sortix/initrd.h
@@ -25,6 +25,8 @@
 #ifndef INCLUDE_SORTIX_INITRD_H
 #define INCLUDE_SORTIX_INITRD_H
 
+#include <stdint.h>
+
 #include <sys/cdefs.h>
 
 __BEGIN_DECLS