diff --git a/Source/CogSample/CogSampleLogCategories.h b/Source/CogSample/CogSampleLogCategories.h
index 1c568e7..c600e27 100644
--- a/Source/CogSample/CogSampleLogCategories.h
+++ b/Source/CogSample/CogSampleLogCategories.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "CoreMinimal.h"
 
 DECLARE_LOG_CATEGORY_EXTERN(LogCogAlways, VeryVerbose, All);