diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -670,11 +670,14 @@
     ('s', 'skip', False, _('skip testing changeset')),
     ('e', 'extend', False, _('extend the bisect range')),
     ('c', 'command', '', _('use command to check changeset state'), _('CMD')),
-    ('U', 'noupdate', False, _('do not update to target'))],
+    ('U', 'noupdate', False, _('do not update to target')),
+    ('', 'abort', False,
+     _('abort bisect and update to the original changeset')),
+    ],
     _("[-gbsr] [-U] [-c CMD] [REV]"))
 def bisect(ui, repo, rev=None, extra=None, command=None,
                reset=None, good=None, bad=None, skip=None, extend=None,
-               noupdate=None):
+               noupdate=None, abort=None):
     """subdivision search of changesets
 
     This command helps to find changesets which introduce problems. To
@@ -770,6 +773,7 @@
         raise error.Abort(_('incompatible arguments'))
 
     incompatibles = {
+        '--abort': abort,
         '--bad': bad,
         '--command': bool(command),
         '--extend': extend,
@@ -788,8 +792,26 @@
         hbisect.resetstate(repo)
         return
 
+    firsttime = not hbisect.stateexists(repo)
     state = hbisect.load_state(repo)
 
+    if abort:
+        if firsttime:
+            raise error.Abort(_('not bisect in progress'))
+        cmdutil.checkunfinished(repo)
+        cmdutil.bailifchanged(repo)
+        if not state['original']:
+            ui.warn(_('warning: not updating since bisect state did not '
+                      'include original changeset\n'))
+        else:
+            node = state['original'][0]
+            hg.clean(repo, node, show_stats=False)
+        hbisect.resetstate(repo)
+        return
+
+    if firsttime:
+        state['original'] = [repo['.'].node()]
+
     # update state
     if good or bad or skip:
         if rev:
diff --git a/mercurial/hbisect.py b/mercurial/hbisect.py
--- a/mercurial/hbisect.py
+++ b/mercurial/hbisect.py
@@ -154,7 +154,7 @@
     return None
 
 def load_state(repo):
-    state = {'current': [], 'good': [], 'bad': [], 'skip': []}
+    state = {'current': [], 'good': [], 'bad': [], 'skip': [], 'original': []}
     for l in repo.vfs.tryreadlines("bisect.state"):
         kind, node = l[:-1].split()
         node = repo.lookup(node)
@@ -163,7 +163,6 @@
         state[kind].append(node)
     return state
 
-
 def save_state(repo, state):
     f = repo.vfs("bisect.state", "w", atomictemp=True)
     with repo.wlock():
@@ -172,6 +171,10 @@
                 f.write("%s %s\n" % (kind, hex(node)))
         f.close()
 
+def stateexists(repo):
+    """return True if bisect state exists, False otherwise"""
+    return repo.vfs.exists("bisect.state")
+
 def resetstate(repo):
     """remove any bisect state from the repository"""
     if repo.vfs.exists("bisect.state"):
diff --git a/tests/test-bisect-abort.t b/tests/test-bisect-abort.t
new file mode 100644
--- /dev/null
+++ b/tests/test-bisect-abort.t
@@ -0,0 +1,36 @@
+  $ cat >> $HGRCPATH <<EOF
+  > [extensions]
+  > drawdag=$TESTDIR/drawdag.py
+  > EOF
+
+  $ hg init
+  $ hg debugdrawdag <<'EOS'
+  > D
+  > |
+  > C
+  > |
+  > B
+  > |
+  > A
+  > EOS
+
+  $ hg update -q C
+  $ hg bisect --abort
+  abort: not bisect in progress
+  [255]
+
+  $ hg bisect --good D
+  $ hg bisect --bad A
+  Testing changeset 1:112478962961 (3 changesets remaining, ~1 tests)
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+
+  $ echo 1 >> A
+  $ hg bisect --abort
+  abort: uncommitted changes
+  [255]
+
+  $ hg update -q -C .
+  $ hg bisect --abort
+
+  $ hg log -r . -T '{desc}\n'
+  C