diff --git a/src/library/st_task_queue.cpp b/src/library/st_task_queue.cpp
index 676ef82b26..0670f0184d 100644
--- a/src/library/st_task_queue.cpp
+++ b/src/library/st_task_queue.cpp
@@ -4,6 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 
 Author: Gabriel Ebner
 */
+#include <vector>
 #include "library/st_task_queue.h"
 
 namespace lean {