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-rw-r--r--src/buildtool/multithreading/task_system.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/buildtool/multithreading/task_system.cpp b/src/buildtool/multithreading/task_system.cpp
index 13c3caec..8011e6ca 100644
--- a/src/buildtool/multithreading/task_system.cpp
+++ b/src/buildtool/multithreading/task_system.cpp
@@ -14,6 +14,8 @@
#include "src/buildtool/multithreading/task_system.hpp"
+#include <optional>
+
#include "gsl/gsl"
#include "src/buildtool/multithreading/task.hpp"