diff --git a/src/main.c b/src/main.c
index 6875ee5..c0059c1 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1008,7 +1008,7 @@
  * Return TRUE when the --not-a-term argument was found.
  */
     int
-is_not_a_term()
+is_not_a_term(void)
 {
     return params.not_a_term;
 }
@@ -1016,8 +1016,8 @@
 /*
  * Return TRUE when the --not-a-term argument was found or the GUI is in use.
  */
-    static int
-is_not_a_term_or_gui()
+    int
+is_not_a_term_or_gui(void)
 {
     return params.not_a_term
 #ifdef FEAT_GUI
diff --git a/src/normal.c b/src/normal.c
index be578ae..0539738 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -6793,11 +6793,8 @@
 		&& !VIsual_active
 		&& no_reason)
 	{
-	    int	out_redir = !stdout_isatty
-#ifdef FEAT_GUI
-				&& !gui.in_use
-#endif
-				;
+	    int	out_redir = !stdout_isatty && !is_not_a_term_or_gui();
+
 	    // The user may accidentally do "vim file | grep word" and then
 	    // CTRL-C doesn't show anything.  With a changed buffer give the
 	    // message on stderr.  Without any changes might as well exit.
diff --git a/src/proto/main.pro b/src/proto/main.pro
index 4368e24..f0f9b73 100644
--- a/src/proto/main.pro
+++ b/src/proto/main.pro
@@ -2,6 +2,7 @@
 int vim_main2(void);
 void common_init(mparm_T *paramp);
 int is_not_a_term(void);
+int is_not_a_term_or_gui(void);
 char_u *get_gui_dialog_file(void);
 int op_pending(void);
 void may_trigger_safestate(int safe);
diff --git a/src/version.c b/src/version.c
index 1cbf551..ad6a9ed 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    571,
+/**/
     570,
 /**/
     569,