diff --git a/src/osdep/signals.c b/src/osdep/signals.c
index 54412f0e..72bc31cc 100644
--- a/src/osdep/signals.c
+++ b/src/osdep/signals.c
@@ -78,7 +78,12 @@ sig_tstp(struct terminal *term)
 	if (!fork()) {
 		sleep(1);
 		kill(pid, SIGCONT);
-		exit(0);
+		/* Use _exit() rather than exit(), so that atexit
+		 * functions are not called, and stdio output buffers
+		 * are not flushed.  Any such things must have been
+		 * inherited from the parent process, which will take
+		 * care of them when appropriate.  */
+		_exit(0);
 	}
 #endif
 	raise(SIGSTOP);