diff --git a/doc/040_backup.rst b/doc/040_backup.rst
index dbccea87a..43657186b 100644
--- a/doc/040_backup.rst
+++ b/doc/040_backup.rst
@@ -357,8 +357,8 @@ environment variables. The following list of environment variables:
     OS_STORAGE_URL                      Storage URL for token authentication
     OS_AUTH_TOKEN                       Auth token for token authentication
 
-    B2_ACCOUNT_ID                       Account ID for Backblaze B2
-    B2_ACCOUNT_KEY                      Account ID for Backblaze B2
+    B2_ACCOUNT_ID                       Account ID or applicationKeyId for Backblaze B2
+    B2_ACCOUNT_KEY                      Account Key or applicationKey for Backblaze B2
 
     AZURE_ACCOUNT_NAME                  Account name for Azure
     AZURE_ACCOUNT_KEY                   Account key for Azure