diff --git a/hgext3rd/smartlog.py b/hgext3rd/smartlog.py
--- a/hgext3rd/smartlog.py
+++ b/hgext3rd/smartlog.py
@@ -52,6 +52,15 @@
 from mercurial import node as nodemod
 from mercurial.i18n import _
 
+logcmdutil_major = 4
+logcmdutil_minor = 6
+fake_semver = r"^(?P<major>[0-9])\.(?P<minor>[0-9])"
+semver = re.match(fake_semver, util.version())
+if semver:
+    if int(semver.group("major")) >= logcmdutil_major \
+            and int(semver.group("minor")) >= logcmdutil_minor:
+        from mercurial import logcmdutil
+
 cmdtable = {}
 command = registrar.command(cmdtable)
 testedwith = 'ships-with-fb-hgext'
@@ -127,8 +136,15 @@
             self.ui.write('\n')
         return res
 
-    extensions.wrapfunction(cmdutil.changeset_printer, '_show', show)
-    extensions.wrapfunction(cmdutil.changeset_templater, '_show', show)
+    try:
+        extensions.wrapfunction(cmdutil.changeset_printer, '_show', show)
+    except AttributeError:
+        extensions.wrapfunction(logcmdutil.changesetprinter, '_show', show)
+
+    try:
+        extensions.wrapfunction(cmdutil.changeset_templater, '_show', show)
+    except AttributeError:
+        extensions.wrapfunction(logcmdutil.changesettemplater, '_show', show)
 
     def ascii(orig, ui, state, type, char, text, coldata):
         if type == 'F':
@@ -628,10 +644,18 @@
         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)
+        try:
+            displayer = cmdutil.show_changeset(ui, repo, opts, buffered=True)
+        except AttributeError:
+            displayer = logcmdutil.changesetdisplayer(ui, repo, opts, buffered=True)
+
         ui.pager('smartlog')
-        cmdutil.displaygraph(
-            ui, repo, revdag, displayer, graphmod.asciiedges, None, None)
+        try:
+            cmdutil.displaygraph(
+                ui, repo, revdag, displayer, graphmod.asciiedges, None, None)
+        except AttributeError:
+            logcmdutil.displaygraph(
+                ui, repo, revdag, displayer, graphmod.asciiedges, None, None)
 
     try:
         with open(repo.vfs.join('completionhints'), 'w+') as f: