diff --git a/mercurial/commit.py b/mercurial/commit.py
--- a/mercurial/commit.py
+++ b/mercurial/commit.py
@@ -335,9 +335,12 @@
             if ms and ms.extras(fname).get(b'filenode-source') == b'other':
                 fparent1, fparent2 = fparent2, nullid
 
+    force_new_node = False
+    if ms and ms.extras(fname).get(b'FORCE_NEW_FILENODE') == b'yes':
+        force_new_node = True
     # is the file changed?
     text = fctx.data()
-    if fparent2 != nullid or meta or flog.cmp(fparent1, text):
+    if fparent2 != nullid or meta or flog.cmp(fparent1, text) or force_new_node:
         if touched is None:  # do not overwrite added
             touched = 'modified'
         fnode = flog.add(text, meta, tr, linkrev, fparent1, fparent2)
diff --git a/tests/test-merge-combination.t b/tests/test-merge-combination.t
--- a/tests/test-merge-combination.t
+++ b/tests/test-merge-combination.t
@@ -113,7 +113,7 @@
   1234 C: agree on "a"
   123- C: agree on "a"
   12-1 C: agree on "a"
-  12-2 C: hg said "", expected "a"
+  12-2 C: agree on "a"
   12-3 C: agree on "a"
   12-- C: agree on "a"
   1-11  : hg said "", expected "a"
diff --git a/tests/test-merge-criss-cross.t b/tests/test-merge-criss-cross.t
--- a/tests/test-merge-criss-cross.t
+++ b/tests/test-merge-criss-cross.t
@@ -604,9 +604,10 @@
      rev linkrev nodeid       p1           p2
        0       0 4b69178b9bda 000000000000 000000000000
        1       1 59e363a07dc8 4b69178b9bda 000000000000
+       2       5 885af55420b3 59e363a07dc8 000000000000
 
   $ hg update 'desc("updating-both-file")'
-  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge 'desc("delete-the-file")' -t :local
   0 files updated, 1 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
@@ -630,11 +631,12 @@
      rev linkrev nodeid       p1           p2
        0       0 4b69178b9bda 000000000000 000000000000
        1       1 59e363a07dc8 4b69178b9bda 000000000000
+       2       5 885af55420b3 59e363a07dc8 000000000000
 
   $ hg log -G -T '{node|short} {desc}\n'
   @    5e3eccec60d8 merge-keeping-the-file-from-updated
   |\
-  +---o  e9b708131723 merge-keeping-the-file-from-deleted
+  +---o  38a4c3e7cac8 merge-keeping-the-file-from-deleted
   | |/
   +---o  a4e0e44229dc merge-deleting-the-file-from-updated
   | |/
@@ -666,16 +668,17 @@
   $ hg update --clean 'desc("merge-deleting-the-file-from-deleted")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge          'desc("merge-keeping-the-file-from-deleted")'
-  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
+  the-file
 
 (merging a deletion with keeping → conflict)
 BROKEN: this should result in conflict
 
   $ hg update --clean 'desc("merge-deleting-the-file-from-deleted")'
-  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg merge          'desc("merge-keeping-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
@@ -698,16 +701,17 @@
   $ hg update --clean 'desc("merge-deleting-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge          'desc("merge-keeping-the-file-from-deleted")'
-  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
+  the-file
 
 (merging a deletion with keeping → conflict)
 BROKEN: this should result in conflict
 
   $ hg update --clean 'desc("merge-deleting-the-file-from-updated")'
-  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg merge          'desc("merge-keeping-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
@@ -719,7 +723,7 @@
   $ hg update --clean 'desc("merge-keeping-the-file-from-updated")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge          'desc("merge-keeping-the-file-from-deleted")'
-  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)
   $ ls -1
   other-file
@@ -729,7 +733,7 @@
 BROKEN: this should result in conflict
 
   $ hg update --clean 'desc("merge-keeping-the-file-from-updated")'
-  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge          'desc("merge-deleted-the-file-from-deleted")'
   abort: empty revision set
   [255]
@@ -752,7 +756,7 @@
 (merging two "keeping" together → no conflict)
 
   $ hg update --clean 'desc("merge-keeping-the-file-from-deleted")'
-  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg merge          'desc("merge-keeping-the-file-from-updated")'
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   (branch merge, don't forget to commit)