diff --git a/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h
index 7a457bd..c15e66a 100644
--- a/include/asm-powerpc/prom.h
+++ b/include/asm-powerpc/prom.h
@@ -276,6 +276,7 @@
  * of_irq_map_raw - Low level interrupt tree parsing
  * @parent:	the device interrupt parent
  * @intspec:	interrupt specifier ("interrupts" property of the device)
+ * @ointsize:   size of the passed in interrupt specifier
  * @addr:	address specifier (start of "reg" property of the device)
  * @out_irq:	structure of_irq filled by this function
  *
@@ -289,7 +290,8 @@
  */
 
 extern int of_irq_map_raw(struct device_node *parent, const u32 *intspec,
-			  const u32 *addr, struct of_irq *out_irq);
+			  u32 ointsize, const u32 *addr,
+			  struct of_irq *out_irq);
 
 
 /**