diff --git a/src/Psalm/Internal/CallMap.php b/src/Psalm/Internal/CallMap.php
index b62537978..cb0d4e8dd 100644
--- a/src/Psalm/Internal/CallMap.php
+++ b/src/Psalm/Internal/CallMap.php
@@ -13702,8 +13702,8 @@ return [
 'stream_context_set_params' => ['bool', 'context'=>'resource', 'options'=>'array'],
 'stream_copy_to_stream' => ['int|false', 'source'=>'resource', 'dest'=>'resource', 'maxlen='=>'int', 'pos='=>'int'],
 'stream_encoding' => ['bool', 'stream'=>'resource', 'encoding='=>'string'],
-'stream_filter_append' => ['resource|false', 'stream'=>'resource', 'filtername'=>'string', 'read_write='=>'int', 'filterparams='=>'array'],
-'stream_filter_prepend' => ['resource|false', 'stream'=>'resource', 'filtername'=>'string', 'read_write='=>'int', 'filterparams='=>'array'],
+'stream_filter_append' => ['resource|false', 'stream'=>'resource', 'filtername'=>'string', 'read_write='=>'int', 'filterparams='=>'mixed'],
+'stream_filter_prepend' => ['resource|false', 'stream'=>'resource', 'filtername'=>'string', 'read_write='=>'int', 'filterparams='=>'mixed'],
 'stream_filter_register' => ['bool', 'filtername'=>'string', 'classname'=>'string'],
 'stream_filter_remove' => ['bool', 'stream_filter'=>'resource'],
 'stream_get_contents' => ['string|false', 'source'=>'resource', 'maxlen='=>'int', 'offset='=>'int'],