diff --git a/include/asm-powerpc/prom.h b/include/asm-powerpc/prom.h
index 7587bf5..f999df1 100644
--- a/include/asm-powerpc/prom.h
+++ b/include/asm-powerpc/prom.h
@@ -203,7 +203,7 @@
 extern int prom_n_size_cells(struct device_node* np);
 extern int prom_n_intr_cells(struct device_node* np);
 extern void prom_get_irq_senses(unsigned char *senses, int off, int max);
-extern void prom_add_property(struct device_node* np, struct property* prop);
+extern int prom_add_property(struct device_node* np, struct property* prop);
 
 #ifdef CONFIG_PPC32
 /*