diff --git a/mm/nommu.c b/mm/nommu.c
index c73aa47..5189b5a 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -79,7 +79,7 @@
 struct rb_root nommu_region_tree = RB_ROOT;
 DECLARE_RWSEM(nommu_region_sem);
 
-struct vm_operations_struct generic_file_vm_ops = {
+const struct vm_operations_struct generic_file_vm_ops = {
 };
 
 /*