1 files changed, 6 insertions, 0 deletions

diff --git a/src/callproc.c b/src/callproc.c
index 1a3ff6fcca9..ddc134658ca 100644
--- a/src/callproc.c
+++ b/src/callproc.c
@@ -787,6 +787,12 @@ usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS)  */)
                 size = decoding_buffer_size (&process_coding, nread);
                 decoding_buf = (char *) xmalloc (size);
                 
+                if (CODING_REQUIRE_DETECTION (&process_coding))
+                  {
+                    detect_coding (&process_coding, bufptr, nread);
+                    if (process_coding.composing != COMPOSITION_DISABLED)
+                      coding_allocate_composition_data (&process_coding, PT);
+                  }
                 if (process_coding.cmp_data)
                   process_coding.cmp_data->char_offset = PT;