diff --git a/src/gui/WndMain.cpp b/src/gui/WndMain.cpp
index 6f26b26281..000ba072a4 100644
--- a/src/gui/WndMain.cpp
+++ b/src/gui/WndMain.cpp
@@ -323,6 +323,10 @@ LRESULT CALLBACK WndMain::WndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lP
 			ChangeWindowMessageFilterEx(hwnd, WM_COPYDATA, MSGFLT_ALLOW, nullptr);
 			ChangeWindowMessageFilterEx(hwnd, 0x0049, MSGFLT_ALLOW, nullptr);
 
+			// Remove rounded corners from the render window on Windows 11
+			const DWM_WINDOW_CORNER_PREFERENCE corner_preference = DWMWCP_DONOTROUND;
+			DwmSetWindowAttribute(hwnd, DWMWA_WINDOW_CORNER_PREFERENCE, &corner_preference, sizeof(corner_preference));
+
             m_bCreated = true;
         }
         break;