diff --git a/src/os_unix.c b/src/os_unix.c
index 0af6016..a0189ea 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -1378,7 +1378,14 @@
 
 #ifdef SIGTSTP
     // See mch_init() for the conditions under which we ignore SIGTSTP.
-    signal(SIGTSTP, ignore_sigtstp ? SIG_IGN : (RETSIGTYPE (*)())sig_tstp);
+    // In the GUI default TSTP processing is OK.
+    // Checking both gui.in_use and gui.starting because gui.in_use is not set
+    // at this point (set after menus are displayed), but gui.starting is set.
+    signal(SIGTSTP, ignore_sigtstp ? SIG_IGN
+# ifdef FEAT_GUI
+				: gui.in_use || gui.starting ? SIG_DFL
+# endif
+				    : (RETSIGTYPE (*)())sig_tstp);
 #endif
 #if defined(SIGCONT)
     signal(SIGCONT, sigcont_handler);