diff --git a/news/hgsplit.rst b/news/hgsplit.rst
new file mode 100644
index 000000000..7b369334d
--- /dev/null
+++ b/news/hgsplit.rst
@@ -0,0 +1,13 @@
+**Added:** None
+
+**Changed:** None
+
+**Deprecated:** None
+
+**Removed:** None
+
+**Fixed:**
+
+* The ``hg split`` command will now predict as unthreadable.
+
+**Security:** None
diff --git a/xonsh/commands_cache.py b/xonsh/commands_cache.py
index 0313d1ef2..29ae58c02 100644
--- a/xonsh/commands_cache.py
+++ b/xonsh/commands_cache.py
@@ -371,9 +371,13 @@ def HG_PREDICTOR_PARSER():
 def predict_hg(args):
     """Predict if mercurial is about to be run in interactive mode.
     If it is interactive, predict False. If it isn't, predict True.
+    Also predict False for certain commands, such as split.
     """
     ns, _ = HG_PREDICTOR_PARSER.parse_known_args(args)
-    return not ns.interactive
+    if hg.command == "split":
+        return False
+    else:
+        return not ns.interactive
 
 
 def default_threadable_predictors():