diff --git a/Kernel/Arch/Processor.h b/Kernel/Arch/Processor.h
index 09ba0440d5..b5a60449a5 100644
--- a/Kernel/Arch/Processor.h
+++ b/Kernel/Arch/Processor.h
@@ -17,10 +17,6 @@ class PageDirectory;
 }
 
 struct ProcessorMessageEntry;
-enum class ProcessorSpecificDataID {
-    MemoryManager,
-    __Count,
-};
 struct ProcessorMessage {
     using CallbackFunction = Function<void()>;
 
diff --git a/Kernel/Arch/ProcessorSpecificDataID.h b/Kernel/Arch/ProcessorSpecificDataID.h
new file mode 100644
index 0000000000..b958790057
--- /dev/null
+++ b/Kernel/Arch/ProcessorSpecificDataID.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+namespace Kernel {
+
+enum class ProcessorSpecificDataID {
+    MemoryManager,
+    __Count,
+};
+
+}
diff --git a/Kernel/Arch/aarch64/Processor.h b/Kernel/Arch/aarch64/Processor.h
index 3992cb252f..f7a5a1e50c 100644
--- a/Kernel/Arch/aarch64/Processor.h
+++ b/Kernel/Arch/aarch64/Processor.h
@@ -11,6 +11,8 @@
 #include <AK/Function.h>
 #include <AK/Types.h>
 
+#include <Kernel/Arch/ProcessorSpecificDataID.h>
+
 namespace Kernel {
 
 class Thread;
diff --git a/Kernel/Arch/x86/Processor.h b/Kernel/Arch/x86/Processor.h
index 0bfcc03937..c2f91e1773 100644
--- a/Kernel/Arch/x86/Processor.h
+++ b/Kernel/Arch/x86/Processor.h
@@ -12,6 +12,7 @@
 #include <AK/Types.h>
 
 #include <Kernel/Arch/DeferredCallEntry.h>
+#include <Kernel/Arch/ProcessorSpecificDataID.h>
 #include <Kernel/Arch/x86/ASM_wrapper.h>
 #include <Kernel/Arch/x86/CPUID.h>
 #include <Kernel/Arch/x86/DescriptorTable.h>