diff --git a/resources/functionMap.php b/resources/functionMap.php
index ba9c994214..2bf2477cb6 100644
--- a/resources/functionMap.php
+++ b/resources/functionMap.php
@@ -3612,7 +3612,7 @@
 'gnupg::seterrormode' => ['void', 'errormode'=>'int'],
 'gnupg::setsignmode' => ['bool', 'signmode'=>'int'],
 'gnupg::sign' => ['string', 'plaintext'=>'string'],
-'gnupg::verify' => ['array', 'signed_text'=>'string', 'signature'=>'string', '&plaintext='=>'string'],
+'gnupg::verify' => ['array', 'signed_text'=>'string', 'signature'=>'string|false', '&plaintext='=>'string'],
 'gnupg_adddecryptkey' => ['bool', 'identifier'=>'resource', 'fingerprint'=>'string', 'passphrase'=>'string'],
 'gnupg_addencryptkey' => ['bool', 'identifier'=>'resource', 'fingerprint'=>'string'],
 'gnupg_addsignkey' => ['bool', 'identifier'=>'resource', 'fingerprint'=>'string', 'passphrase='=>'string'],
@@ -3633,7 +3633,7 @@
 'gnupg_seterrormode' => ['void', 'identifier'=>'resource', 'errormode'=>'int'],
 'gnupg_setsignmode' => ['bool', 'identifier'=>'resource', 'signmode'=>'int'],
 'gnupg_sign' => ['string', 'identifier'=>'resource', 'plaintext'=>'string'],
-'gnupg_verify' => ['array', 'identifier'=>'resource', 'signed_text'=>'string', 'signature'=>'string', 'plaintext='=>'string'],
+'gnupg_verify' => ['array', 'identifier'=>'resource', 'signed_text'=>'string', 'signature'=>'string|false', '&plaintext='=>'string'],
 'gopher_parsedir' => ['array', 'dirent'=>'string'],
 'grapheme_extract' => ['string|false', 'str'=>'string', 'size'=>'int', 'extract_type='=>'int', 'start='=>'int', '&w_next='=>'int'],
 'grapheme_stripos' => ['int|false', 'haystack'=>'string', 'needle'=>'string', 'offset='=>'int'],