diff --git a/src/tasks.rs b/src/tasks.rs
index a0658fd5..66981733 100644
--- a/src/tasks.rs
+++ b/src/tasks.rs
@@ -116,7 +116,7 @@ pub struct TaskCancelation {
 #[serde(rename_all = "camelCase")]
 pub struct TaskDeletion {
     pub matched_tasks: usize,
-    pub deleted_tasks: usize,
+    pub deleted_tasks: Option<usize>,
     pub original_filter: String,
 }