diff --git a/src/NodaTimeAutotranslater.php b/src/NodaTimeAutotranslater.php
index f1398f0..39a4445 100644
--- a/src/NodaTimeAutotranslater.php
+++ b/src/NodaTimeAutotranslater.php
@@ -754,7 +754,7 @@ final class NodaTimeAutotranslater {
      */
     public static function getTranslations(array $timeInfo):array {
 
-        if (!empty($timespanDates = NodaTimeSplitter::attempt_splitting_from_till($timeInfo['zeit_name']))) {
+        if (!empty($timespanDates = NodaTimeSplitter::attempt_splitting_from_till((string)$timeInfo['zeit_name']))) {
 
             $output = [];
 
diff --git a/src/NodaTimeSplitter.php b/src/NodaTimeSplitter.php
index cb6ec62..6c6e66d 100644
--- a/src/NodaTimeSplitter.php
+++ b/src/NodaTimeSplitter.php
@@ -993,7 +993,7 @@ final class NodaTimeSplitter {
      *
      * @param string $datum Date.
      *
-     * @return array<array<string>>
+     * @return array<string>
      */
     public static function attempt_splitting_from_till(string $datum):array {