diff --git a/gdb/event-top.c b/gdb/event-top.c
index 3f98c05..e5a5ac6 100644
--- a/gdb/event-top.c
+++ b/gdb/event-top.c
@@ -469,11 +469,10 @@ async_disable_stdin (void)
 static void
 command_handler (char *command)
 {
-  int stdin_is_tty = ISATTY (stdin);
   struct cleanup *stat_chain;
 
   clear_quit_flag ();
-  if (instream == stdin && stdin_is_tty)
+  if (instream == stdin)
     reinitialize_more_filter ();
 
   /* If readline returned a NULL command, it means that the connection
diff --git a/gdb/top.c b/gdb/top.c
index d1e2271..a45f3cc 100644
--- a/gdb/top.c
+++ b/gdb/top.c
@@ -542,7 +542,6 @@ command_loop (void)
 {
   struct cleanup *old_chain;
   char *command;
-  int stdin_is_tty = ISATTY (stdin);
 
   while (instream && !feof (instream))
     {
@@ -550,7 +549,7 @@ command_loop (void)
 	(*window_hook) (instream, get_prompt ());
 
       clear_quit_flag ();
-      if (instream == stdin && stdin_is_tty)
+      if (instream == stdin)
 	reinitialize_more_filter ();
       old_chain = make_cleanup (null_cleanup, 0);