diff --git a/src/gl/win.rs b/src/gl/win.rs
index 7e4289c..097eb09 100644
--- a/src/gl/win.rs
+++ b/src/gl/win.rs
@@ -192,6 +192,7 @@ impl GlContext {
         };
 
         wglMakeCurrent(hdc_tmp, std::ptr::null_mut());
+        wglDeleteContext(hglrc_tmp);
         ReleaseDC(hwnd_tmp, hdc_tmp);
         UnregisterClassW(class as *const WCHAR, hinstance);
         DestroyWindow(hwnd_tmp);