diff --git a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
index 1552cd7dc2..9e3c7ba7af 100644
--- a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
@@ -4,7 +4,7 @@
 
 #include "InputCommon/ControllerInterface/ControllerInterface.h"
 
-#include <mutex>
+#include <algorithm>
 
 #include "Common/Logging/Log.h"
 
@@ -232,6 +232,7 @@ void ControllerInterface::UpdateInput()
 //
 void ControllerInterface::RegisterDevicesChangedCallback(std::function<void()> callback)
 {
+  std::lock_guard<std::mutex> lk(m_callbacks_mutex);
   m_devices_changed_callbacks.emplace_back(std::move(callback));
 }
 
@@ -242,6 +243,7 @@ void ControllerInterface::RegisterDevicesChangedCallback(std::function<void()> c
 //
 void ControllerInterface::InvokeDevicesChangedCallbacks() const
 {
+  std::lock_guard<std::mutex> lk(m_callbacks_mutex);
   for (const auto& callback : m_devices_changed_callbacks)
     callback();
 }
diff --git a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h
index e70c135b3e..b485cda31a 100644
--- a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h
+++ b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h
@@ -4,14 +4,11 @@
 
 #pragma once
 
-#include <algorithm>
 #include <functional>
-#include <map>
-#include <sstream>
-#include <string>
+#include <memory>
+#include <mutex>
 #include <vector>
 
-#include "Common/CommonTypes.h"
 #include "InputCommon/ControllerInterface/Device.h"
 
 // enable disable sources
@@ -58,6 +55,7 @@ public:
 
 private:
   std::vector<std::function<void()>> m_devices_changed_callbacks;
+  mutable std::mutex m_callbacks_mutex;
   bool m_is_init;
   void* m_hwnd;
 };