diff --git a/gfx/cairo/cairo/src/win32/cairo-win32-surface.c b/gfx/cairo/cairo/src/win32/cairo-win32-surface.c
--- a/gfx/cairo/cairo/src/win32/cairo-win32-surface.c
+++ b/gfx/cairo/cairo/src/win32/cairo-win32-surface.c
@@ -347,7 +347,8 @@ cairo_int_status_t
             next_logical_y = _cairo_lround (next_user_y);
 
             dxy_buf[j] = _cairo_lround (next_logical_x - logical_x);
-            dxy_buf[j+1] = _cairo_lround (next_logical_y - logical_y);
+            /* Note that GDI coordinate system is inverted! */
+            dxy_buf[j+1] = _cairo_lround (logical_y - next_logical_y);
 
             logical_x = next_logical_x;
             logical_y = next_logical_y;