diff --git a/hgext3rd/fbsparse.py b/hgext3rd/fbsparse.py
--- a/hgext3rd/fbsparse.py
+++ b/hgext3rd/fbsparse.py
@@ -11,6 +11,7 @@
 from mercurial import util, cmdutil, extensions, context, dirstate, commands
 from mercurial import localrepo, error, hg, pathutil, registrar, patch
 from mercurial import match as matchmod
+from mercurial import logcmdutil
 from mercurial import merge as mergemod
 from mercurial.node import nullid
 from mercurial.i18n import _
@@ -204,7 +205,11 @@
                 return any(f for f in ctx.files() if sparsematch(f))
             revs = revs.filter(ctxmatch)
         return revs
-    extensions.wrapfunction(cmdutil, '_logrevs', _logrevs)
+    try:
+        from mercurial import logcmdutil
+        extensions.wrapfunction(logcmdutil, '_initialrevs', _logrevs)
+    except ImportError, AttributeError:
+        extensions.wrapfunction(logcmdutil, '_logrevs', _logrevs)
 
 def _clonesparsecmd(orig, ui, repo, *args, **opts):
     include_pat = opts.get('include')