diff --git a/library/includes/functions.php b/library/includes/functions.php
index fdbecd012..0e5c963ff 100644
--- a/library/includes/functions.php
+++ b/library/includes/functions.php
@@ -354,7 +354,7 @@ function setbit(&$int, $bit_num, $on)
     forum auth levels, this will prevent the auth function having to do its own
     lookup
 */
-function auth($type, $forum_id, $ug_data, $f_access = array(), $group_perm = UG_PERM_BOTH)
+function auth($type, $forum_id, $ug_data, array $f_access = array(), $group_perm = UG_PERM_BOTH)
 {
     global $lang, $bf, $datastore;
 
@@ -2002,7 +2002,7 @@ class log_action
         }
     }
 
-    public function mod($type_name, $args = array())
+    public function mod($type_name, array $args = array())
     {
         global $userdata;
 
@@ -2050,7 +2050,7 @@ class log_action
         DB()->query("INSERT INTO " . BB_LOG . " $sql_args");
     }
 
-    public function admin($type_name, $args = array())
+    public function admin($type_name, array $args = array())
     {
         $this->mod($type_name, $args);
     }
@@ -2287,7 +2287,7 @@ function log_sphinx_error($err_type, $err_msg, $query = '')
     }
 }
 
-function get_title_match_topics($title_match_sql, $forum_ids = array())
+function get_title_match_topics($title_match_sql, array $forum_ids = array())
 {
     global $bb_cfg, $sphinx, $userdata, $title_match, $lang;
 
diff --git a/library/includes/functions_upload.php b/library/includes/functions_upload.php
index a20f59ec0..0cf159bc5 100644
--- a/library/includes/functions_upload.php
+++ b/library/includes/functions_upload.php
@@ -59,7 +59,7 @@ class upload_common
         8 => 'tiff',
     );
 
-    public function init($cfg = array(), $post_params = array(), $uploaded_only = true): bool
+    public function init(array $cfg = array(), array $post_params = array(), $uploaded_only = true): bool
     {
         global $bb_cfg, $lang;
 
@@ -129,7 +129,7 @@ class upload_common
         return true;
     }
 
-    public function store($mode = '', $params = array())
+    public function store($mode = '', array $params = array())
     {
         if ($mode == 'avatar') {
             delete_avatar($params['user_id'], $params['avatar_ext_id']);
diff --git a/library/includes/sessions.php b/library/includes/sessions.php
index 9f21c23f7..7e5458e34 100644
--- a/library/includes/sessions.php
+++ b/library/includes/sessions.php
@@ -105,7 +105,7 @@ class user_common
      * @param array $cfg
      * @return array|bool|null
      */
-    public function session_start($cfg = array())
+    public function session_start(array $cfg = array())
     {
         global $bb_cfg;