diff --git a/dictionaries/CallMap.php b/dictionaries/CallMap.php
index fec8a8e8c5d..82601b0185c 100644
--- a/dictionaries/CallMap.php
+++ b/dictionaries/CallMap.php
@@ -7304,7 +7304,7 @@
 'mb_regex_set_options' => ['string', 'options='=>'string|null'],
 'mb_scrub' => ['string', 'string'=>'string', 'encoding='=>'string|null'],
 'mb_send_mail' => ['bool', 'to'=>'string', 'subject'=>'string', 'message'=>'string', 'additional_headers='=>'string|array', 'additional_params='=>'string|null'],
-'mb_split' => ['list<string>', 'pattern'=>'string', 'string'=>'string', 'limit='=>'int'],
+'mb_split' => ['list<string>|false', 'pattern'=>'string', 'string'=>'string', 'limit='=>'int'],
 'mb_str_split' => ['list<string>', 'string'=>'string', 'length='=>'positive-int', 'encoding='=>'string|null'],
 'mb_strcut' => ['string', 'string'=>'string', 'start'=>'int', 'length='=>'?int', 'encoding='=>'string|null'],
 'mb_strimwidth' => ['string', 'string'=>'string', 'start'=>'int', 'width'=>'int', 'trim_marker='=>'string', 'encoding='=>'string|null'],
diff --git a/dictionaries/CallMap_historical.php b/dictionaries/CallMap_historical.php
index 8acc9772488..2d3c36a466b 100644
--- a/dictionaries/CallMap_historical.php
+++ b/dictionaries/CallMap_historical.php
@@ -12914,7 +12914,7 @@
     'mb_regex_encoding' => ['string|bool', 'encoding='=>'string'],
     'mb_regex_set_options' => ['string', 'options='=>'string'],
     'mb_send_mail' => ['bool', 'to'=>'string', 'subject'=>'string', 'message'=>'string', 'additional_headers='=>'string|array', 'additional_params='=>'string'],
-    'mb_split' => ['list<string>', 'pattern'=>'string', 'string'=>'string', 'limit='=>'int'],
+    'mb_split' => ['list<string>|false', 'pattern'=>'string', 'string'=>'string', 'limit='=>'int'],
     'mb_strcut' => ['string', 'string'=>'string', 'start'=>'int', 'length='=>'?int', 'encoding='=>'string'],
     'mb_strimwidth' => ['string', 'string'=>'string', 'start'=>'int', 'width'=>'int', 'trim_marker='=>'string', 'encoding='=>'string'],
     'mb_stripos' => ['int|false', 'haystack'=>'string', 'needle'=>'string', 'offset='=>'int', 'encoding='=>'string'],