diff --git a/mm/filemap_xip.c b/mm/filemap_xip.c
index 427dfe3..1888b2d 100644
--- a/mm/filemap_xip.c
+++ b/mm/filemap_xip.c
@@ -296,7 +296,7 @@
 	}
 }
 
-static struct vm_operations_struct xip_file_vm_ops = {
+static const struct vm_operations_struct xip_file_vm_ops = {
 	.fault	= xip_file_fault,
 };