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-rw-r--r--core/opt_traits.hpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/core/opt_traits.hpp b/core/opt_traits.hpp
index c660208..44aaa37 100644
--- a/core/opt_traits.hpp
+++ b/core/opt_traits.hpp
@@ -4,6 +4,7 @@
#ifndef ARRAY_OPERATION
#define ARRAY_OPERATION
+#define OPT_HEADER
#include <cstddef>
namespace opt_utilities
{