1 files changed, 2 insertions, 0 deletions

diff --git a/src/fileio.c b/src/fileio.c
index 13c99bee109..0db8ed793b3 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -1307,6 +1307,8 @@ the root directory.  */)
               newdir = SSDATA (hdir);
               newdirlim = newdir + SBYTES (hdir);
             }
+          else if (!multibyte && STRING_MULTIBYTE (tem))
+            multibyte = 1;
 #ifdef DOS_NT
           collapse_newdir = false;
 #endif