diff --git a/src/shared/shell.c b/src/shared/shell.c
index 2e094b8..d58e2d7 100644
--- a/src/shared/shell.c
+++ b/src/shared/shell.c
@@ -1277,10 +1277,10 @@ bool bt_shell_attach(int fd)
 
 	io = io_new(fd);
 
-	if (!data.mode)
+	if (!data.mode) {
 		io_set_read_handler(io, input_read, NULL, NULL);
-
-	io_set_disconnect_handler(io, io_hup, NULL, NULL);
+		io_set_disconnect_handler(io, io_hup, NULL, NULL);
+	}
 
 	data.input = io;