diff --git a/docs/persistence/sql/queries.rst b/docs/persistence/sql/queries.rst
index d2528703ce..a204add96b 100644
--- a/docs/persistence/sql/queries.rst
+++ b/docs/persistence/sql/queries.rst
@@ -473,11 +473,11 @@ and overwrite this simple method to support expressions like this, for example:
 Joining with other tables
 -------------------------
 
-.. php:method:: join($foreign_table, $master_field, $join_kind)
+.. php:method:: join($foreignTable, $master_field, $join_kind)
 
     Join results with additional table using "JOIN" statement in your query.
 
-    :param string|array $foreign_table: table to join (may include field and alias)
+    :param string|array $foreignTable: table to join (may include field and alias)
     :param mixed  $master_field:  main field (and table) to join on or Expression
     :param string $join_kind:     'left' (default), 'inner', 'right' etc - which join type to use
     :returns: $this
diff --git a/src/Model/Join.php b/src/Model/Join.php
index d062d8a1b6..9c1ce50635 100644
--- a/src/Model/Join.php
+++ b/src/Model/Join.php
@@ -33,7 +33,7 @@ class Join
     /**
      * Foreign model or WITH/CTE alias when used with SQL persistence.
      *
-     * @var Model|string
+     * @var string
      */
     protected $foreign_table;
 
@@ -119,15 +119,12 @@ class Join
     /** @var array<int, array<string, mixed>> Data indexed by spl_object_id(entity) which is populated here as the save/insert progresses. */
     private $saveBufferByOid = [];
 
-    /**
-     * @param Model|string $foreignTable
-     */
-    public function __construct($foreignTable = null)
+    public function __construct(string $foreignTable = null)
     {
         $this->foreign_table = $foreignTable;
 
         // handle foreign table containing a dot - that will be reverse join
-        if (is_string($this->foreign_table) && strpos($this->foreign_table, '.') !== false) {
+        if (strpos($this->foreign_table, '.') !== false) {
             // split by LAST dot in foreign_table name
             [$this->foreign_table, $this->foreign_field] = preg_split('~\.+(?=[^.]+$)~', $this->foreign_table);
             $this->reverse = true;
@@ -320,10 +317,9 @@ public function addFields(array $fields = [], array $defaults = [])
     /**
      * Another join will be attached to a current join.
      *
-     * @param Model|string         $foreignTable
      * @param array<string, mixed> $defaults
      */
-    public function join($foreignTable, array $defaults = []): self
+    public function join(string $foreignTable, array $defaults = []): self
     {
         $defaults['joinName'] = $this->short_name;
 
@@ -333,10 +329,9 @@ public function join($foreignTable, array $defaults = []): self
     /**
      * Another leftJoin will be attached to a current join.
      *
-     * @param Model|string         $foreignTable
      * @param array<string, mixed> $defaults
      */
-    public function leftJoin($foreignTable, array $defaults = []): self
+    public function leftJoin(string $foreignTable, array $defaults = []): self
     {
         $defaults['joinName'] = $this->short_name;
 
diff --git a/src/Model/JoinsTrait.php b/src/Model/JoinsTrait.php
index ead134f8a6..02ed7d7127 100644
--- a/src/Model/JoinsTrait.php
+++ b/src/Model/JoinsTrait.php
@@ -5,7 +5,6 @@
 namespace Atk4\Data\Model;
 
 use Atk4\Data\Exception;
-use Atk4\Data\Model;
 
 /**
  * Provides native Model methods for join functionality.
@@ -22,10 +21,9 @@ trait JoinsTrait
      * join will also query $foreignTable in order to find additional fields. When inserting
      * the record will be also added inside $foreignTable and relationship will be maintained.
      *
-     * @param Model|string         $foreignTable
      * @param array<string, mixed> $defaults
      */
-    public function join($foreignTable, array $defaults = []): Join
+    public function join(string $foreignTable, array $defaults = []): Join
     {
         $this->assertIsModel();
 
@@ -49,10 +47,9 @@ public function join($foreignTable, array $defaults = []): Join
      *
      * @see join()
      *
-     * @param Model|string         $foreignTable
      * @param array<string, mixed> $defaults
      */
-    public function leftJoin($foreignTable, array $defaults = []): Join
+    public function leftJoin(string $foreignTable, array $defaults = []): Join
     {
         $defaults['weak'] = true;