fix #4375

7 years ago · 51d047a35e
1 changed files with 1 additions and 1 deletions
--- a/lib/network.py
+++ b/lib/network.py
@ -870,7 +870,7 @@ class Network(util.DaemonThread):
                        next_height = None
                    else:
                        interface.print_error('checkpoint conflicts with existing fork', branch.path())
-                        branch.write('', 0)
+                        branch.write(b'', 0)
                        branch.save_header(interface.bad_header)
                        interface.mode = 'catch_up'
                        interface.blockchain = branch