diff --git a/coders/preview.c b/coders/preview.c
index a7be719..383cb89 100644
--- a/coders/preview.c
+++ b/coders/preview.c
@@ -189,7 +189,7 @@
   write_info=CloneImageInfo(image_info);
   (void) SetImageInfo(write_info,1,&image->exception);
   if (LocaleCompare(write_info->magick,"PREVIEW") == 0)
-    (void) FormatMagickString(preview_image->filename,MaxTextExtent,
+    (void) FormatLocaleString(preview_image->filename,MaxTextExtent,
       "miff:%s",image_info->filename);
   status=WriteImage(write_info,preview_image);
   preview_image=DestroyImage(preview_image);