diff --git a/NAMESPACE b/NAMESPACE
index 080f3db..4ce6d2b 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -27,7 +27,6 @@ S3method(required_pkgs,numeric_range)
 S3method(required_pkgs,predictions_custom)
 S3method(required_pkgs,probability_calibration)
 S3method(required_pkgs,probability_threshold)
-S3method(tunable,adjustment)
 S3method(tunable,equivocal_zone)
 S3method(tunable,numeric_calibration)
 S3method(tunable,numeric_range)
diff --git a/R/utils.R b/R/utils.R
index a0688b3..ba741d0 100644
--- a/R/utils.R
+++ b/R/utils.R
@@ -74,11 +74,6 @@ tune_args.adjustment <- function(object, full = FALSE, ...) {
   )
 }
 
-#' @export
-tunable.adjustment <- function(x, ...) {
-  no_param
-}
-
 # for adjustments with no tunable parameters
 no_param <-
   tibble::tibble(