diff --git a/mercurial/hg.py b/mercurial/hg.py
--- a/mercurial/hg.py
+++ b/mercurial/hg.py
@@ -1137,7 +1137,7 @@
 
 
 def merge(
-    repo, node, force=None, remind=True, mergeforce=False, labels=None,
+    repo, node, force=False, remind=True, mergeforce=False, labels=None,
 ):
     """Branch merge with node, resolving changes. Return true if any
     unresolved conflicts."""