diff --git a/AK/RecursionDecision.h b/AK/RecursionDecision.h
index ea3c602042..277220b129 100644
--- a/AK/RecursionDecision.h
+++ b/AK/RecursionDecision.h
@@ -6,6 +6,8 @@
 
 #pragma once
 
+#include <AK/Platform.h>
+
 namespace AK {
 
 enum class RecursionDecision {