diff --git a/src/include/gpxe/ramdisk.h b/src/include/gpxe/ramdisk.h
new file mode 100644
index 00000000..c2317590
--- /dev/null
+++ b/src/include/gpxe/ramdisk.h
@@ -0,0 +1,19 @@
+#ifndef _GPXE_RAMDISK_H
+#define _GPXE_RAMDISK_H
+
+/**
+ * @file
+ *
+ * RAM disks
+ *
+ */
+
+#include <gpxe/uaccess.h>
+#include <gpxe/blockdev.h>
+
+struct ramdisk {
+	struct block_device blockdev;
+	userptr_t data;
+};
+
+#endif /* _GPXE_RAMDISK_H */