diff --git a/hgext3rd/fbamend/common.py b/hgext3rd/fbamend/common.py
--- a/hgext3rd/fbamend/common.py
+++ b/hgext3rd/fbamend/common.py
@@ -43,10 +43,10 @@
     """
     # Get visible descendants of precusors of rev.
     # Excluding obsoleted changesets avoids divergence issues.
-    allprecursors = repo.revs('allprecursors(%d)', rev)
+    allpredecessors = repo.revs('allpredecessors(%d)', rev)
     fmt = ('%s(%%ld) - %%ld - obsolete()'
            % ('children' if childrenonly else 'descendants'))
-    descendants = repo.revs(fmt, allprecursors, allprecursors)
+    descendants = repo.revs(fmt, allpredecessors, allpredecessors)
 
     # Nothing to do if there are no descendants.
     if not descendants:
diff --git a/hgext3rd/fbamend/restack.py b/hgext3rd/fbamend/restack.py
--- a/hgext3rd/fbamend/restack.py
+++ b/hgext3rd/fbamend/restack.py
@@ -67,7 +67,7 @@
        to be correctly rebased.
     """
     childrenof = common.getchildrelationships(repo,
-        repo.revs('%d + allprecursors(%d)', base, base))
+        repo.revs('%d + allpredecessors(%d)', base, base))
 
     # Perform BFS starting from base.
     queue = deque([base])
@@ -93,7 +93,7 @@
         # Look for visible precursors (which are probably visible because
         # they have unstable descendants) and successors (for which the latest
         # non-obsolete version should be visible).
-        precursors = repo.revs('allprecursors(%d)', rev)
+        precursors = repo.revs('allpredecessors(%d)', rev)
         successors = repo.revs('allsuccessors(%d)', rev)
 
         # If this changeset has precursors but no successor, then