1 files changed, 2 insertions, 1 deletions

diff --git a/src/callproc.c b/src/callproc.c
index bee100fc3c6..da3654a3411 100644
--- a/src/callproc.c
+++ b/src/callproc.c
@@ -764,7 +764,8 @@ usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS)  */)
         
         if (!NILP (buffer))
           {
-            if (! CODING_MAY_REQUIRE_DECODING (&process_coding))
+            if (NILP (current_buffer->enable_multibyte_characters)
+                && ! CODING_MAY_REQUIRE_DECODING (&process_coding))
               insert_1_both (bufptr, nread, nread, 0, 1, 0);
             else
               {                 /* We have to decode the input.  */