diff --git a/hgext3rd/smartlog.py b/hgext3rd/smartlog.py
--- a/hgext3rd/smartlog.py
+++ b/hgext3rd/smartlog.py
@@ -52,6 +52,19 @@
 from mercurial import node as nodemod
 from mercurial.i18n import _
 
+try:
+    # >= 4.6
+    from mercurial import logcmdutil
+    changesetprinter = logcmdutil.changesetprinter
+    changesettemplater = logcmdutil.changesettemplater
+    displaygraph = logcmdutil.displaygraph
+    csdisplayer = logcmdutil.changesetdisplayer
+except ImportError:
+    changesetprinter = cmdutil.changeset_printer
+    changesettemplater = cmdutil.changeset_templater
+    displaygraph = cmdutil.displaygraph
+    csdisplayer = cmdutil.show_changeset
+
 cmdtable = {}
 command = registrar.command(cmdtable)
 testedwith = 'ships-with-fb-hgext'
@@ -127,8 +140,8 @@
             self.ui.write('\n')
         return res
 
-    extensions.wrapfunction(cmdutil.changeset_printer, '_show', show)
-    extensions.wrapfunction(cmdutil.changeset_templater, '_show', show)
+    extensions.wrapfunction(changesetprinter, '_show', show)
+    extensions.wrapfunction(changesettemplater, '_show', show)
 
     def ascii(orig, ui, state, type, char, text, coldata):
         if type == 'F':
@@ -628,9 +641,10 @@
         overrides[('experimental', 'graphstyle.grandparent')] = '2.'
     with ui.configoverride(overrides, 'smartlog'):
         revdag = getdag(ui, repo, revs, masterrev)
-        displayer = cmdutil.show_changeset(ui, repo, opts, buffered=True)
+        displayer = csdisplayer(ui, repo, opts, buffered=True)
+
         ui.pager('smartlog')
-        cmdutil.displaygraph(
+        displaygraph(
             ui, repo, revdag, displayer, graphmod.asciiedges, None, None)
 
     try: