diff --git a/resources/functionMap.php b/resources/functionMap.php
index 94246d7bcb..ab19acb700 100644
--- a/resources/functionMap.php
+++ b/resources/functionMap.php
@@ -2000,7 +2000,7 @@
 'DOMText::__construct' => ['void', 'value='=>'string'],
 'DOMText::isElementContentWhitespace' => ['bool'],
 'DOMText::isWhitespaceInElementContent' => ['bool'],
-'DOMText::splitText' => ['DOMText', 'offset'=>'int'],
+'DOMText::splitText' => ['DOMText|false', 'offset'=>'int'],
 'domxml_new_doc' => ['DomDocument', 'version'=>'string'],
 'domxml_open_file' => ['DomDocument', 'filename'=>'string', 'mode='=>'int', 'error='=>'array'],
 'domxml_open_mem' => ['DomDocument', 'str'=>'string', 'mode='=>'int', 'error='=>'array'],