diff --git a/include/hw/loader.h b/include/hw/loader.h
index 0a0ad80..de8a296 100644
--- a/include/hw/loader.h
+++ b/include/hw/loader.h
@@ -175,10 +175,15 @@
 int load_aout(const char *filename, hwaddr addr, int max_sz,
               int bswap_needed, hwaddr target_page_size);
 
+#define LOAD_UIMAGE_LOADADDR_INVALID (-1)
+
 /** load_uimage_as:
  * @filename: Path of uimage file
  * @ep: Populated with program entry point. Ignored if NULL.
- * @loadaddr: Populated with the load address. Ignored if NULL.
+ * @loadaddr: load address if none specified in the image or when loading a
+ *            ramdisk. Populated with the load address. Ignored if NULL or
+ *            LOAD_UIMAGE_LOADADDR_INVALID (images which do not specify a load
+ *            address will not be loadable).
  * @is_linux: Is set to true if the image loaded is Linux. Ignored if NULL.
  * @translate_fn: optional function to translate load addresses
  * @translate_opaque: opaque data passed to @translate_fn