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-rw-r--r--src/utils/optional_bool.hpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/utils/optional_bool.hpp b/src/utils/optional_bool.hpp
index 3d00d23..ebd063d 100644
--- a/src/utils/optional_bool.hpp
+++ b/src/utils/optional_bool.hpp
@@ -1,5 +1,6 @@
#pragma once
+#include <ostream>
#include <string>
struct OptionalBool