diff --git a/DESCRIPTION b/DESCRIPTION
index 288f93209..bb7badd18 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -52,7 +52,7 @@ Imports:
     lgr (>= 0.3.4),
     mlbench,
     mlr3measures (>= 0.4.1),
-    mlr3misc (>= 0.12.0),
+    mlr3misc (>= 0.14.0),
     parallelly,
     palmerpenguins,
     paradox (>= 0.10.0),
diff --git a/NEWS.md b/NEWS.md
index e1274404e..d73918169 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,8 @@
 # mlr3 (development version)
 
+* feat: dictionary conversion of `mlr_learners` respects prototype arguments
+recently added in mlr3misc
+
 # mlr3 0.17.2
 
 * Skip new `data.table` tests on mac.
diff --git a/R/mlr_learners.R b/R/mlr_learners.R
index c544ea25e..4ac19a432 100644
--- a/R/mlr_learners.R
+++ b/R/mlr_learners.R
@@ -45,7 +45,7 @@ as.data.table.DictionaryLearner = function(x, ..., objects = FALSE) {
   assert_flag(objects)
 
   setkeyv(map_dtr(x$keys(), function(key) {
-    l = withCallingHandlers(x$get(key),
+    l = withCallingHandlers(x$get(key, .prototype = TRUE),
       packageNotFoundWarning = function(w) invokeRestart("muffleWarning"))
     insert_named(
       list(key = key, label = l$label, task_type = l$task_type, feature_types = list(l$feature_types), packages = list(l$packages),
diff --git a/tests/testthat/test_Dictionary.R b/tests/testthat/test_Dictionary.R
index 98402030f..67a76ae37 100644
--- a/tests/testthat/test_Dictionary.R
+++ b/tests/testthat/test_Dictionary.R
@@ -9,3 +9,20 @@ test_that("Dictionary: clone works", {
 test_that("$keys(pattern) works", {
   expect_subset(mlr_learners$keys("classif"), mlr_learners$keys(), empty.ok = FALSE)
 })
+
+test_that("dictionary to data.table conversion works with prototype arguments", {
+  LearnerRegrRpart2 = R6Class("LearnerRegrRpart2",
+    inherit = LearnerRegrRpart,
+    public = list(
+      x = NULL,
+      initialize = function(x) {
+        self$x = x
+        super$initialize()
+      }
+    )
+  )
+  on.exit(mlr_learners$remove("regr.rpart2"))
+  mlr_learners$add("regr.rpart2", LearnerRegrRpart2, .prototype_args = list(x = 123))
+
+  expect_data_table(as.data.table(mlr_learners))
+})