diff --git a/src/api2/backup/environment.rs b/src/api2/backup/environment.rs
index dc8a0176..0260ac6e 100644
--- a/src/api2/backup/environment.rs
+++ b/src/api2/backup/environment.rs
@@ -400,9 +400,9 @@ impl BackupEnvironment {
         let blob_len = data.len();
         let orig_len = data.len(); // fixme:
 
-        let mut blob = DataBlob::from_raw(data)?;
-        // always comput CRC at server side
-        blob.set_crc(blob.compute_crc());
+        let blob = DataBlob::from_raw(data)?;
+        // always verify CRC at server side
+        blob.verify_crc()?;
 
         let raw_data = blob.raw_data();
         file_set_contents(&path, raw_data, None)?;