diff --git a/dlls/wined3d/surface.c b/dlls/wined3d/surface.c
index 1242bbc..6724471 100644
--- a/dlls/wined3d/surface.c
+++ b/dlls/wined3d/surface.c
@@ -2637,9 +2638,9 @@ static HRESULT IWineD3DSurfaceImpl_BltOv
                     } else {
                         glCopyTexSubImage2D(GL_TEXTURE_2D,
                                             0, /* level */
-                                            rect.x1, This->currentDesc.Height - row - 1, /* xoffset, yoffset */
-                                            srect.x1, Src->currentDesc.Height - srect.y2 + row * yrel,
-                                            rect.x2, 1);
+                                            rect.x1, rect.y2 + rect.y1 - row - 1, /* xoffset, yoffset */
+                                            srect.x1, row - rect.y1,
+                                            rect.x2-rect.x1, 1);
                     }
                 }