diff --git a/src/win32/i_input.cpp b/src/win32/i_input.cpp
index 74791cc5c..7753566e9 100644
--- a/src/win32/i_input.cpp
+++ b/src/win32/i_input.cpp
@@ -525,8 +525,10 @@ LRESULT CALLBACK WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 			}
 			else
 			{
-				mmi->ptMinTrackSize.x = VID_MIN_WIDTH;
-				mmi->ptMinTrackSize.y = VID_MIN_HEIGHT;
+				RECT rect = { 0, 0, VID_MIN_WIDTH, VID_MIN_HEIGHT };
+				AdjustWindowRectEx(&rect, GetWindowLongW(hWnd, GWL_STYLE), FALSE, GetWindowLongW(hWnd, GWL_EXSTYLE));
+				mmi->ptMinTrackSize.x = rect.right - rect.left;
+				mmi->ptMinTrackSize.y = rect.bottom - rect.top;
 			}
 			return 0;
 		}