diff --git a/include/initrd/initrd.h b/include/initrd/initrd.h
new file mode 100644
index 0000000..69f2bac
--- /dev/null
+++ b/include/initrd/initrd.h
@@ -0,0 +1,15 @@
+#pragma once
+
+struct initrd_global_header
+{
+	unsigned int magic;
+	unsigned long num_files;
+} __attribute__((packed));
+
+struct initrd_file_header
+{
+	char name[64];
+	unsigned long size;
+};
+
+/* that's it! */