diff --git a/src/bin/proxmox-backup-client.rs b/src/bin/proxmox-backup-client.rs
index af45e95f..4701f458 100644
--- a/src/bin/proxmox-backup-client.rs
+++ b/src/bin/proxmox-backup-client.rs
@@ -913,7 +913,7 @@ fn verify_index_file(backup_index: &Value, name: &str, csum: &[u8; 32], size: u6
         None => bail!("index does not contain property 'size' for file '{}'", name),
         Some(expected_size) => {
             if expected_size != size {
-                bail!("verify index failed - wrong size for file '{}'", name);
+                bail!("verify index failed - wrong size for file '{}' ({} != {}", name, expected_size, size);
             }
         }
     };
diff --git a/src/client/http_client.rs b/src/client/http_client.rs
index 8c36a7cd..57bc0c46 100644
--- a/src/client/http_client.rs
+++ b/src/client/http_client.rs
@@ -660,7 +660,7 @@ impl BackupClient {
 
         let csum = openssl::sha::sha256(&raw_data);
         let param = json!({"encoded-size": raw_data.len(), "file-name": file_name });
-        let size = raw_data.len() as u64; // fixme: should be decoded size instead??
+        let size = raw_data.len() as u64;
         let _value = self.h2.upload("POST", "blob", Some(param), "application/octet-stream", raw_data).await?;
         Ok(BackupStats { size, csum })
     }
@@ -674,8 +674,6 @@ impl BackupClient {
         sign_only: bool,
      ) -> Result<BackupStats, Error> {
 
-        let size = data.len() as u64;
-
         let blob = if let Some(crypt_config) = crypt_config {
             if sign_only {
                 DataBlob::create_signed(&data, crypt_config, compress)?
@@ -687,9 +685,10 @@ impl BackupClient {
         };
 
         let raw_data = blob.into_inner();
+        let size = raw_data.len() as u64;
 
         let csum = openssl::sha::sha256(&raw_data);
-        let param = json!({"encoded-size": raw_data.len(), "file-name": file_name });
+        let param = json!({"encoded-size": size, "file-name": file_name });
         let _value = self.h2.upload("POST", "blob", Some(param), "application/octet-stream", raw_data).await?;
         Ok(BackupStats { size, csum })
     }
@@ -714,12 +713,12 @@ impl BackupClient {
             .await
             .map_err(|err| format_err!("unable to read file {:?} - {}", src_path, err))?;
 
-        let size: u64 = contents.len() as u64;
         let blob = DataBlob::encode(&contents, crypt_config, compress)?;
         let raw_data = blob.into_inner();
+        let size = raw_data.len() as u64;
         let csum = openssl::sha::sha256(&raw_data);
         let param = json!({
-            "encoded-size": raw_data.len(),
+            "encoded-size": size,
             "file-name": file_name,
         });
         self.h2.upload("POST", "blob", Some(param), "application/octet-stream", raw_data).await?;