diff --git a/README.md b/README.md
index b805e787..fe5a2c76 100644
--- a/README.md
+++ b/README.md
@@ -179,6 +179,7 @@ information on what to include when reporting a bug.
  - [Win32] Added the `GLFW_WIN32_KEYBOARD_MENU` window hint for enabling access
            to the window menu
  - [Win32] Added a version info resource to the GLFW DLL
+ - [Win32] Made hidden helper window use its own window class
  - [Win32] Disabled framebuffer transparency on Windows 7 when DWM windows are
    opaque (#1512)
  - [Win32] Bugfix: `GLFW_INCLUDE_VULKAN` plus `VK_USE_PLATFORM_WIN32_KHR` caused
diff --git a/src/win32_init.c b/src/win32_init.c
index 1cdc5b98..c2dc1322 100644
--- a/src/win32_init.c
+++ b/src/win32_init.c
@@ -331,15 +331,63 @@ static void createKeyTables(void)
     }
 }
 
+// Window procedure for the hidden helper window
+//
+static LRESULT CALLBACK helperWindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
+{
+    switch (uMsg)
+    {
+        case WM_DISPLAYCHANGE:
+            _glfwPollMonitorsWin32();
+            break;
+
+        case WM_DEVICECHANGE:
+        {
+            if (!_glfw.joysticksInitialized)
+                break;
+
+            if (wParam == DBT_DEVICEARRIVAL)
+            {
+                DEV_BROADCAST_HDR* dbh = (DEV_BROADCAST_HDR*) lParam;
+                if (dbh && dbh->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE)
+                    _glfwDetectJoystickConnectionWin32();
+            }
+            else if (wParam == DBT_DEVICEREMOVECOMPLETE)
+            {
+                DEV_BROADCAST_HDR* dbh = (DEV_BROADCAST_HDR*) lParam;
+                if (dbh && dbh->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE)
+                    _glfwDetectJoystickDisconnectionWin32();
+            }
+
+            break;
+        }
+    }
+
+    return DefWindowProcW(hWnd, uMsg, wParam, lParam);
+}
+
 // Creates a dummy window for behind-the-scenes work
 //
 static GLFWbool createHelperWindow(void)
 {
     MSG msg;
+    WNDCLASSEXW wc = { sizeof(wc) };
+
+    wc.style         = CS_OWNDC;
+    wc.lpfnWndProc   = (WNDPROC) helperWindowProc;
+    wc.hInstance     = _glfw.win32.instance;
+    wc.lpszClassName = L"GLFW3 Helper";
+
+    if (!RegisterClassExW(&wc))
+    {
+        _glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
+                             "WIn32: Failed to register helper window class");
+        return GLFW_FALSE;
+    }
 
     _glfw.win32.helperWindowHandle =
         CreateWindowExW(WS_EX_OVERLAPPEDWINDOW,
-                        _GLFW_WNDCLASSNAME,
+                        L"GLFW3 Helper",
                         L"GLFW message window",
                         WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
                         0, 0, 1, 1,
@@ -663,7 +711,10 @@ void _glfwTerminateWin32(void)
         UnregisterDeviceNotification(_glfw.win32.deviceNotificationHandle);
 
     if (_glfw.win32.helperWindowHandle)
+    {
         DestroyWindow(_glfw.win32.helperWindowHandle);
+        UnregisterClassW(L"GLFW3 Helper", _glfw.win32.instance);
+    }
 
     _glfwUnregisterWindowClassWin32();
 
diff --git a/src/win32_window.c b/src/win32_window.c
index 95174497..cefb2cf6 100644
--- a/src/win32_window.c
+++ b/src/win32_window.c
@@ -533,59 +533,26 @@ static void maximizeWindowManually(_GLFWwindow* window)
                  SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED);
 }
 
-// Window callback function (handles window messages)
+// Window procedure for user-created windows
 //
 static LRESULT CALLBACK windowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
     _GLFWwindow* window = GetPropW(hWnd, L"GLFW");
     if (!window)
     {
-        // This is the message handling for the hidden helper window
-        // and for a regular window during its initial creation
-
-        switch (uMsg)
+        if (uMsg == WM_NCCREATE)
         {
-            case WM_NCCREATE:
+            if (_glfwIsWindows10Version1607OrGreaterWin32())
             {
-                if (_glfwIsWindows10Version1607OrGreaterWin32())
-                {
-                    const CREATESTRUCTW* cs = (const CREATESTRUCTW*) lParam;
-                    const _GLFWwndconfig* wndconfig = cs->lpCreateParams;
+                const CREATESTRUCTW* cs = (const CREATESTRUCTW*) lParam;
+                const _GLFWwndconfig* wndconfig = cs->lpCreateParams;
 
-                    // On per-monitor DPI aware V1 systems, only enable
-                    // non-client scaling for windows that scale the client area
-                    // We need WM_GETDPISCALEDSIZE from V2 to keep the client
-                    // area static when the non-client area is scaled
-                    if (wndconfig && wndconfig->scaleToMonitor)
-                        EnableNonClientDpiScaling(hWnd);
-                }
-
-                break;
-            }
-
-            case WM_DISPLAYCHANGE:
-                _glfwPollMonitorsWin32();
-                break;
-
-            case WM_DEVICECHANGE:
-            {
-                if (!_glfw.joysticksInitialized)
-                    break;
-
-                if (wParam == DBT_DEVICEARRIVAL)
-                {
-                    DEV_BROADCAST_HDR* dbh = (DEV_BROADCAST_HDR*) lParam;
-                    if (dbh && dbh->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE)
-                        _glfwDetectJoystickConnectionWin32();
-                }
-                else if (wParam == DBT_DEVICEREMOVECOMPLETE)
-                {
-                    DEV_BROADCAST_HDR* dbh = (DEV_BROADCAST_HDR*) lParam;
-                    if (dbh && dbh->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE)
-                        _glfwDetectJoystickDisconnectionWin32();
-                }
-
-                break;
+                // On per-monitor DPI aware V1 systems, only enable
+                // non-client scaling for windows that scale the client area
+                // We need WM_GETDPISCALEDSIZE from V2 to keep the client
+                // area static when the non-client area is scaled
+                if (wndconfig && wndconfig->scaleToMonitor)
+                    EnableNonClientDpiScaling(hWnd);
             }
         }