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-rw-r--r--src/compile/optionals.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/compile/optionals.h b/src/compile/optionals.h
index 2a93d53e..ddacba63 100644
--- a/src/compile/optionals.h
+++ b/src/compile/optionals.h
@@ -1,3 +1,6 @@
+// This file defines how to compile optionals and null
+#pragma once
+
#include "../ast.h"
#include "../environment.h"
#include "../stdlib/datatypes.h"