diff --git a/Magick++/lib/Options.cpp b/Magick++/lib/Options.cpp
index 1d44072..04fe105 100644
--- a/Magick++/lib/Options.cpp
+++ b/Magick++/lib/Options.cpp
@@ -357,7 +357,7 @@
 {
   ExceptionInfo exception;
 
-  FormatMagickString( _imageInfo->filename, MaxTextExtent, "%.1024s:", magick_.c_str() );
+  FormatLocaleString( _imageInfo->filename, MaxTextExtent, "%.1024s:", magick_.c_str() );
   GetExceptionInfo(&exception);
   SetImageInfo( _imageInfo, 1, &exception);
   if ( *_imageInfo->magick == '\0' )