diff --git a/R/ParameterList.R b/R/ParameterList.R
index 14b9e4ca..f2a5aca9 100644
--- a/R/ParameterList.R
+++ b/R/ParameterList.R
@@ -147,16 +147,16 @@ names.ParameterList <- function(x) {
 #' @describeIn ParameterList-Getter-Methods The parameter-list's parameter initial values
 #' @export
 initialValues.ParameterList <- function(object, n_chains, ...) {
-    x <- lapply(
+    vapply(
         seq_len(n_chains),
         \(i) {
             vals <- lapply(object@parameters, initialValues)
             name <- vapply(object@parameters, names, character(1))
             names(vals) <- name
             vals
-        }
+        },
+        FUN.VALUE = list()
     )
-    return(x)
 }