diff --git a/CHANGES.md b/CHANGES.md
index 2b77ac222cb..6923fcdb137 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,8 +1,8 @@
-Unreleased
-----------
+3.9.1 (unreleased)
+------------------
 
-- Disable background operations on MacOS and other Unixes where we rely on
-  fork. (#8100, fixes #8083, @rgrinberg)
+- Disable background operations and threaded console on MacOS and other Unixes
+  where we rely on fork. (#8100, #8121, fixes #8083, @rgrinberg, @emillon)
 
 3.9.0 (2023-06-28)
 ------------------
diff --git a/src/dune_config/config.ml b/src/dune_config/config.ml
index 1b43d3b3a76..eac22094920 100644
--- a/src/dune_config/config.ml
+++ b/src/dune_config/config.ml
@@ -146,7 +146,7 @@ let threaded_console =
   let t =
     { name = "threaded_console"
     ; of_string = Toggle.of_string
-    ; value = `Enabled
+    ; value = background_default
     }
   in
   register t;