diff --git a/resources/functionMap.php b/resources/functionMap.php
index 82789aea05..bfea3b1a19 100644
--- a/resources/functionMap.php
+++ b/resources/functionMap.php
@@ -138,14 +138,14 @@
 'apcu_cache_info' => ['__benevolent<array<string,mixed>|false>', 'limited='=>'bool'],
 'apcu_cas' => ['bool', 'key'=>'string', 'old'=>'int', 'new'=>'int'],
 'apcu_clear_cache' => ['bool'],
-'apcu_dec' => ['int', 'key'=>'string', 'step='=>'int', '&w_success='=>'bool', 'ttl='=>'int'],
+'apcu_dec' => ['false|int', 'key'=>'string', 'step='=>'int', '&w_success='=>'bool', 'ttl='=>'int'],
 'apcu_delete' => ['bool', 'key'=>'string|APCuIterator'],
 'apcu_delete\'1' => ['list<string>', 'key'=>'string[]'],
 'apcu_entry' => ['mixed', 'key'=>'string', 'generator'=>'callable', 'ttl='=>'int'],
 'apcu_exists' => ['bool', 'keys'=>'string'],
 'apcu_exists\'1' => ['array', 'keys'=>'string[]'],
 'apcu_fetch' => ['mixed', 'key'=>'string|string[]', '&w_success='=>'bool'],
-'apcu_inc' => ['int', 'key'=>'string', 'step='=>'int', '&w_success='=>'bool', 'ttl='=>'int'],
+'apcu_inc' => ['false|int', 'key'=>'string', 'step='=>'int', '&w_success='=>'bool', 'ttl='=>'int'],
 'apcu_sma_info' => ['__benevolent<array|false>', 'limited='=>'bool'],
 'apcu_store' => ['bool', 'key'=>'string', 'var='=>'', 'ttl='=>'int'],
 'apcu_store\'1' => ['array', 'values'=>'array', 'unused='=>'', 'ttl='=>'int'],