diff --git a/Changelog.md b/Changelog.md
index c2829dd..8fdf9ad 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,7 @@
+###
+
+- fix for middle mouse button not working
+
 ### 4.5
 
 - opening a URL manually no longer uses a input box but uses the clipboard directly
diff --git a/mpv.net/WinForms/MainForm.cs b/mpv.net/WinForms/MainForm.cs
index 5e3162e..a45b80b 100644
--- a/mpv.net/WinForms/MainForm.cs
+++ b/mpv.net/WinForms/MainForm.cs
@@ -329,6 +329,8 @@ namespace mpvnet
                 case 0x0104: // WM_SYSKEYDOWN
                 case 0x0105: // WM_SYSKEYUP
                 case 0x020A: // WM_MOUSEWHEEL
+                case 0x0207: // WM_MBUTTONDOWN
+                case 0x0208: // WM_MBUTTONUP
                     if (mp.WindowHandle != IntPtr.Zero)
                         Native.SendMessage(mp.WindowHandle, m.Msg, m.WParam, m.LParam);
                     break;