diff --git a/src/client-ocurl/config.ml b/src/client-ocurl/config.ml
index bda563e4..2ea68fb7 100644
--- a/src/client-ocurl/config.ml
+++ b/src/client-ocurl/config.ml
@@ -35,7 +35,7 @@ let pp out self =
 let make ?(debug = !debug_) ?(url = get_url ()) ?(headers = get_headers ())
     ?(batch_timeout_ms = 2_000) ?(bg_threads = 4) ?(ticker_thread = true)
     ?(ticker_interval_ms = 500) ?(self_trace = false) () : t =
-  let bg_threads = max 2 (min bg_threads 32) in
+  let bg_threads = max 1 (min bg_threads 32) in
   {
     debug;
     url;
diff --git a/src/client-ocurl/config.mli b/src/client-ocurl/config.mli
index d5dddf30..dfc35c08 100644
--- a/src/client-ocurl/config.mli
+++ b/src/client-ocurl/config.mli
@@ -15,13 +15,16 @@ type t = private {
       only checked when a new event occurs or when a tick
       is emitted. Default 2_000. *)
   bg_threads: int;
-      (** Are there background threads, and how many? Default [4] *)
+      (** Are there background threads, and how many? Default [4].
+            This will be adjusted to be at least [1] and at most [32]. *)
   ticker_thread: bool;
       (** If true, start a thread that regularly checks if signals should
           be sent to the collector. Default [true] *)
   ticker_interval_ms: int;
       (** Interval for ticker thread, in milliseconds. This is
           only useful if [ticker_thread] is [true].
+          This will be clamped between [2 ms] and some longer
+          interval (maximum [60s] currently).
       Default 500.
       @since NEXT_RELEASE *)
   self_trace: bool;