diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -14,8 +14,10 @@ import stat
 
 from .i18n import _
 from .node import (
+    addednodeid,
     bin,
     hex,
+    modifiednodeid,
     newnodeid,
     nullid,
     nullrev,
@@ -1232,23 +1234,13 @@ class committablectx(basectx):
         """
         parents = self.parents()
 
-        man1 = parents[0].manifest()
-        man = man1.copy()
-        if len(parents) > 1:
-            man2 = self.p2().manifest()
-            def getman(f):
-                if f in man1:
-                    return man1
-                return man2
-        else:
-            getman = lambda f: man1
+        man = parents[0].manifest().copy()
 
-        copied = self._repo.dirstate.copies()
         ff = self._flagfunc
-        for i, l in (("a", self._status.added), ("m", self._status.modified)):
+        for i, l in ((addednodeid, self._status.added),
+                     (modifiednodeid, self._status.modified)):
             for f in l:
-                orig = copied.get(f, f)
-                man[f] = getman(orig).get(orig, nullid) + i
+                man[f] = i
                 try:
                     man.setflag(f, ff(f))
                 except OSError:
diff --git a/mercurial/copies.py b/mercurial/copies.py
--- a/mercurial/copies.py
+++ b/mercurial/copies.py
@@ -278,7 +278,7 @@ def _makegetfctx(ctx):
         ac = repo.changelog.ancestors(revs, inclusive=True)
         ctx._ancestrycontext = ac
     def makectx(f, n):
-        if len(n) != 20 or n in node.wdirnodes:  # in a working context?
+        if n in node.wdirnodes:  # in a working context?
             if ctx.rev() is None:
                 return ctx.filectx(f)
             return repo[None][f]
diff --git a/mercurial/merge.py b/mercurial/merge.py
--- a/mercurial/merge.py
+++ b/mercurial/merge.py
@@ -15,6 +15,7 @@ import struct
 
 from .i18n import _
 from .node import (
+    addednodeid,
     bin,
     hex,
     nullhex,
@@ -873,7 +874,7 @@ def manifestmerge(repo, wctx, p2, pa, br
                     else:
                         actions[f] = ('cd', (f, None, f, False, pa.node()),
                                       "prompt changed/deleted")
-                elif n1[20:] == 'a':
+                elif n1 == addednodeid:
                     # This extra 'a' is added by working copy manifest to mark
                     # the file as locally added. We should forget it instead of
                     # deleting it.
diff --git a/mercurial/node.py b/mercurial/node.py
--- a/mercurial/node.py
+++ b/mercurial/node.py
@@ -20,8 +20,10 @@ nullhex = hex(nullid)
 # Phony node value to stand-in for new files in some uses of
 # manifests.
 newnodeid = '!' * 20
+addednodeid = ('0' * 15) + 'added'
+modifiednodeid = ('0' * 12) + 'modified'
 
-wdirnodes = set((newnodeid,))
+wdirnodes = set((newnodeid, addednodeid, modifiednodeid))
 
 # pseudo identifiers for working directory
 # (they are experimental, so don't add too many dependencies on them)