diff --git a/include/asm-powerpc/system.h b/include/asm-powerpc/system.h
index eff3de9..32aa42b 100644
--- a/include/asm-powerpc/system.h
+++ b/include/asm-powerpc/system.h
@@ -559,5 +559,7 @@
 extern void account_system_vtime(struct task_struct *);
 #endif
 
+extern struct dentry *powerpc_debugfs_root;
+
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_SYSTEM_H */