diff --git a/tools/server/server-context.h b/tools/server/server-context.h
index 631d573fcb..75f3d2de56 100644
--- a/tools/server/server-context.h
+++ b/tools/server/server-context.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "server-http.h"
 #include "server-task.h"
 #include "server-queue.h"