diff --git a/src/misc/task_executor.cpp b/src/misc/task_executor.cpp
index adf8d51..9a09fb1 100644
--- a/src/misc/task_executor.cpp
+++ b/src/misc/task_executor.cpp
@@ -385,6 +385,8 @@ bool task_executor::cancel_task(task_id task_id) {
             return true;
 
         case task_cancel_result::not_found:
+            return false;
+
         default:
             assert(false);
             return false;