diff --git a/mm/nommu.c b/mm/nommu.c
index c53e9c8..ce74452 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1067,7 +1067,7 @@
 	return -ENOMEM;
 }
 
-void arch_unmap_area(struct vm_area_struct *area)
+void arch_unmap_area(struct mm_struct *mm, unsigned long addr)
 {
 }