1 files changed, 3 insertions, 2 deletions

diff --git a/src/process.h b/src/process.h
index 392b661ce69..92baf0c4cb9 100644
--- a/src/process.h
+++ b/src/process.h
@@ -156,8 +156,9 @@ struct Lisp_Process
     /* True means kill silently if Emacs is exited.
        This is the inverse of the `query-on-exit' flag.  */
     bool_bf kill_without_query : 1;
-    /* True if communicating through a pty.  */
-    bool_bf pty_flag : 1;
+    /* True if communicating through a pty for input or output.  */
+    bool_bf pty_in : 1;
+    bool_bf pty_out : 1;
     /* Flag to set coding-system of the process buffer from the
        coding_system used to decode process output.  */
     bool_bf inherit_coding_system_flag : 1;