diff --git a/src/gmic_stdlib.gmic b/src/gmic_stdlib.gmic
index da318b30b..f045cfce7 100644
--- a/src/gmic_stdlib.gmic
+++ b/src/gmic_stdlib.gmic
@@ -39659,6 +39659,7 @@ gui_print_preview : skip "${1=},${3=}" check "${2=32}>=0 && ${4=20}>=0"
   if $! k[0] fi
   drgba
   siz={0$_preview_area_width?[0$_preview_area_width,0$_preview_area_height]:\
+       0$_preview_width?[0$_preview_width,0$_preview_height]:\
        [${fitscreen\ {[max(w,1),max(h,1),1]},400,800}]}
   sizw={arg(1,$siz)-8}
   if $! rr2d $siz,2,3 drgba else $siz,1,3,128 fi