diff --git a/tasks/files/snapshot.py b/tasks/files/snapshot.py
index d39ee33..ea4da5c 100644
--- a/tasks/files/snapshot.py
+++ b/tasks/files/snapshot.py
@@ -75,7 +75,7 @@ class SnapshotStatus:
     ERROR_INVALID_PERCENT_REQUESTED = 24
     ERROR_UNKNOWN_FAILURE = 25
     ERROR_REVERT_FAILED = 26
-    ERROR_EXTNED_NOT_SNAPSHOT = 27
+    ERROR_EXTEND_NOT_SNAPSHOT = 27
     ERROR_EXTNED_NOT_FOUND = 28
     ERROR_EXTNED_FAILED = 29
     ERROR_EXTNED_VERIFY_FAILED = 29