diff --git a/resources/functionMap.php b/resources/functionMap.php
index 3c2428f5db..aea642904a 100644
--- a/resources/functionMap.php
+++ b/resources/functionMap.php
@@ -11987,7 +11987,7 @@
 'strchr' => ['string|false', 'haystack'=>'string', 'needle'=>'string', 'before_needle='=>'bool'],
 'strcmp' => ['int<-1, 1>', 'str1'=>'string', 'str2'=>'string'],
 'strcoll' => ['int<-1, 1>', 'str1'=>'string', 'str2'=>'string'],
-'strcspn' => ['int', 'str'=>'string', 'mask'=>'string', 'start='=>'int', 'length='=>'int'],
+'strcspn' => ['non-negative-int', 'str'=>'string', 'mask'=>'string', 'start='=>'int', 'length='=>'int'],
 'stream_bucket_append' => ['void', 'brigade'=>'resource', 'bucket'=>'object'],
 'stream_bucket_make_writeable' => ['stdClass|null', 'brigade'=>'resource'],
 'stream_bucket_new' => ['object', 'stream'=>'resource', 'buffer'=>'string'],
@@ -12078,7 +12078,7 @@
 'strrev' => ['string', 'str'=>'string'],
 'strripos' => ['0|positive-int|false', 'haystack'=>'string', 'needle'=>'string|int', 'offset='=>'int'],
 'strrpos' => ['0|positive-int|false', 'haystack'=>'string', 'needle'=>'string|int', 'offset='=>'int'],
-'strspn' => ['int', 'str'=>'string', 'mask'=>'string', 'start='=>'int', 'len='=>'int'],
+'strspn' => ['non-negative-int', 'str'=>'string', 'mask'=>'string', 'start='=>'int', 'len='=>'int'],
 'strstr' => ['string|false', 'haystack'=>'string', 'needle'=>'mixed', 'before_needle='=>'bool'],
 'strtok' => ['non-empty-string|false', 'str'=>'string', 'token'=>'string'],
 'strtok\'1' => ['non-empty-string|false', 'token'=>'string'],