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);