diff --git a/src/Reflection/SignatureMap/functionMap.php b/src/Reflection/SignatureMap/functionMap.php
index ff6e30db14..e82712421a 100644
--- a/src/Reflection/SignatureMap/functionMap.php
+++ b/src/Reflection/SignatureMap/functionMap.php
@@ -1719,14 +1719,14 @@
 'dba_sync' => ['bool', 'handle'=>'resource'],
 'dbase_add_record' => ['bool', 'dbase_identifier'=>'resource', 'record'=>'array'],
 'dbase_close' => ['bool', 'dbase_identifier'=>'resource'],
-'dbase_create' => ['resource', 'filename'=>'string', 'fields'=>'array'],
+'dbase_create' => ['resource|false', 'filename'=>'string', 'fields'=>'array'],
 'dbase_delete_record' => ['bool', 'dbase_identifier'=>'resource', 'record_number'=>'int'],
 'dbase_get_header_info' => ['array', 'dbase_identifier'=>'resource'],
 'dbase_get_record' => ['array', 'dbase_identifier'=>'resource', 'record_number'=>'int'],
 'dbase_get_record_with_names' => ['array', 'dbase_identifier'=>'resource', 'record_number'=>'int'],
 'dbase_numfields' => ['int', 'dbase_identifier'=>'resource'],
 'dbase_numrecords' => ['int', 'dbase_identifier'=>'resource'],
-'dbase_open' => ['resource', 'filename'=>'string', 'mode'=>'int'],
+'dbase_open' => ['resource|false', 'filename'=>'string', 'mode'=>'int'],
 'dbase_pack' => ['bool', 'dbase_identifier'=>'resource'],
 'dbase_replace_record' => ['bool', 'dbase_identifier'=>'resource', 'record'=>'array', 'record_number'=>'int'],
 'dbplus_add' => ['int', 'relation'=>'resource', 'tuple'=>'array'],