1 files changed, 8 insertions, 3 deletions

diff --git a/src/fileio.c b/src/fileio.c
index 6cda1e39eed..e18ddb1a7aa 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -4263,9 +4263,14 @@ by calling `format-decode', which see.  */)
       if (CODING_FOR_UNIBYTE (&coding)
           /* Can't do this if part of the buffer might be preserved.  */
           && NILP (replace))
-        /* Visiting a file with these coding system makes the buffer
-           unibyte.  */
-        bset_enable_multibyte_characters (current_buffer, Qnil);
+        {
+          /* Visiting a file with these coding system makes the buffer
+             unibyte.  */
+          if (inserted > 0)
+            bset_enable_multibyte_characters (current_buffer, Qnil);
+          else
+            Fset_buffer_multibyte (Qnil);
+        }
     }
 
   coding.dst_multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters));