diff --git a/mercurial/hgweb.py b/mercurial/hgweb.py
--- a/mercurial/hgweb.py
+++ b/mercurial/hgweb.py
@@ -265,7 +265,7 @@ class hgweb:
                     'changelogentry',
                     parity = parity,
                     author = changes[1],
-                    parent1 = self.parents("changelogparent",
+                    parent = self.parents("changelogparent",
                                           cl.parents(n), cl.rev),
                     changelogtag = self.showtag("changelogtag",n),
                     p1 = hex(p1), p2 = hex(p2),
@@ -331,7 +331,7 @@ class hgweb:
                     'searchentry',
                     parity = count & 1,
                     author = changes[1],
-                    parent1 = self.parents("changelogparent",
+                    parent = self.parents("changelogparent",
                                           cl.parents(n), cl.rev),
                     changelogtag = self.showtag("changelogtag",n),
                     p1 = hex(p1), p2 = hex(p2),
@@ -380,7 +380,7 @@ class hgweb:
                      diff = diff,
                      rev = cl.rev(n),
                      node = nodeid,
-                     parent1 = self.parents("changesetparent",
+                     parent = self.parents("changesetparent",
                                            cl.parents(n), cl.rev),
                      changesettag = self.showtag("changesettag",n),
                      p1 = hex(p1), p2 = hex(p2),
@@ -462,7 +462,7 @@ class hgweb:
                      manifest = hex(mfn),
                      author = cs[1],
                      date = t,
-                     parent1 = self.parents("filerevparent",
+                     parent = self.parents("filerevparent",
                                            fl.parents(n), fl.rev, file=f),
                      p1 = hex(p1), p2 = hex(p2),
                      permissions = self.repo.manifest.readflags(mfn)[f],
@@ -529,7 +529,7 @@ class hgweb:
                      manifest = hex(mfn),
                      author = cs[1],
                      date = t,
-                     parent1 = self.parents("fileannotateparent",
+                     parent = self.parents("fileannotateparent",
                                            fl.parents(n), fl.rev, file=f),
                      p1 = hex(p1), p2 = hex(p2),
                      permissions = self.repo.manifest.readflags(mfn)[f],