diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 05772ae..df4ce99 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -396,9 +396,11 @@
 	rc = ecryptfs_write_lower(ecryptfs_inode, file_size_virt, 0,
 				  sizeof(u64));
 	kfree(file_size_virt);
-	if (rc)
+	if (rc < 0)
 		printk(KERN_ERR "%s: Error writing file size to header; "
 		       "rc = [%d]\n", __func__, rc);
+	else
+		rc = 0;
 out:
 	return rc;
 }