diff --git a/mm/migrate.c b/mm/migrate.c
index 2bb4e1d..a9eff3f 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1129,7 +1129,7 @@
  	struct vm_area_struct *vma;
  	int err = 0;
 
- 	for(vma = mm->mmap; vma->vm_next && !err; vma = vma->vm_next) {
+	for (vma = mm->mmap; vma && !err; vma = vma->vm_next) {
  		if (vma->vm_ops && vma->vm_ops->migrate) {
  			err = vma->vm_ops->migrate(vma, to, from, flags);
  			if (err)