--- a/hgext3rd/serverminitopic.py	Thu Apr 19 10:50:24 2018 +0200
+++ b/hgext3rd/serverminitopic.py	Thu Apr 19 10:53:59 2018 +0200
@@ -18,9 +18,14 @@
     node,
     registrar,
     util,
-    wireproto,
 )
 
+try:
+    from mercurial import wireproto
+    wireproto.branchmap
+except ImportError: # <= hg-4.5
+    from mercurial import wireprotov1server as wireproto
+
 if util.safehasattr(registrar, 'configitem'):
 
     configtable = {}