diff --git a/src/test/forge.h b/src/test/forge.h
index 6ab199b..8a22ddf 100644
--- a/src/test/forge.h
+++ b/src/test/forge.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "../h/graph.h"
 
 using namespace ctgl;