diff --git a/drivers/staging/android/ion/ion.h b/drivers/staging/android/ion/ion.h
index 7409437ffdd8..c24c6e230654 100644
--- a/drivers/staging/android/ion/ion.h
+++ b/drivers/staging/android/ion/ion.h
@@ -180,7 +180,8 @@ struct ion_heap {
 	wait_queue_head_t waitqueue;
 	struct task_struct *task;
 
-	int (*debug_show)(struct ion_heap *heap, struct seq_file *, void *);
+	int (*debug_show)(struct ion_heap *heap, struct seq_file *s,
+			  void *unused);
 };
 
 /**