diff --git a/Source/Core/Core/HW/WiimoteEmu/Extension/Extension.h b/Source/Core/Core/HW/WiimoteEmu/Extension/Extension.h
index 4a055c597d..d836e49a46 100644
--- a/Source/Core/Core/HW/WiimoteEmu/Extension/Extension.h
+++ b/Source/Core/Core/HW/WiimoteEmu/Extension/Extension.h
@@ -3,8 +3,6 @@
 
 #pragma once
 
-#include "Core/HW/WiimoteEmu/Extension/Extension.h"
-
 #include <array>
 #include <string>
 
@@ -69,10 +67,6 @@ public:
 
   using Extension::Extension;
 
-  // TODO: This is public for TAS reasons.
-  // TODO: TAS handles encryption poorly.
-  EncryptionKey ext_key;
-
   static constexpr int CALIBRATION_CHECKSUM_BYTES = 2;
 
 #pragma pack(push, 1)
@@ -103,6 +97,7 @@ public:
   static_assert(0x100 == sizeof(Register));
 
 protected:
+  EncryptionKey ext_key;
   Register m_reg = {};
 
   void Reset() override;
diff --git a/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp b/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp
index 17be61079d..f8115afdf8 100644
--- a/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp
+++ b/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp
@@ -803,14 +803,6 @@ Extension* Wiimote::GetActiveExtension() const
   return static_cast<Extension*>(m_attachments->GetAttachmentList()[m_active_extension].get());
 }
 
-EncryptionKey Wiimote::GetExtensionEncryptionKey() const
-{
-  if (ExtensionNumber::NONE == GetActiveExtensionNumber())
-    return {};
-
-  return static_cast<EncryptedExtension*>(GetActiveExtension())->ext_key;
-}
-
 bool Wiimote::IsSideways() const
 {
   const bool sideways_modifier_toggle = m_hotkeys->GetSettingsModifier()[0];
diff --git a/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h b/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h
index e50a6efbc9..be5fdfdc6e 100644
--- a/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h
+++ b/Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h
@@ -246,9 +246,6 @@ private:
   Extension* GetActiveExtension() const;
   Extension* GetNoneExtension() const;
 
-  // TODO: Kill this nonsensical function used for TAS:
-  EncryptionKey GetExtensionEncryptionKey() const;
-
   struct ReadRequest
   {
     WiimoteCommon::AddressSpace space;