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-rw-r--r--logic/NullInstance.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/logic/NullInstance.h b/logic/NullInstance.h
index dc2a8de3..d46230f4 100644
--- a/logic/NullInstance.h
+++ b/logic/NullInstance.h
@@ -1,3 +1,4 @@
+#pragma once
#include "BaseInstance.h"
class NullInstance: public BaseInstance