diff --git a/Kernel/Arch/x86/TSS.h b/Kernel/Arch/x86/TSS.h
index 014e352644..ef735ad1f3 100644
--- a/Kernel/Arch/x86/TSS.h
+++ b/Kernel/Arch/x86/TSS.h
@@ -9,6 +9,9 @@
 
 #include <AK/Types.h>
 
+#include <AK/Platform.h>
+VALIDATE_IS_X86()
+
 namespace Kernel {
 
 struct [[gnu::packed]] TSS32 {