diff --git a/framework/db/ActiveQuery.php b/framework/db/ActiveQuery.php
index 008f5f11e8..b928f31880 100644
--- a/framework/db/ActiveQuery.php
+++ b/framework/db/ActiveQuery.php
@@ -699,7 +699,7 @@ class ActiveQuery extends Query implements ActiveQueryInterface
      * @return static
      * @see via()
      */
-    public function viaTable($tableName, $link, $callable = null)
+    public function viaTable($tableName, $link, callable $callable = null)
     {
         $relation = new ActiveQuery(get_class($this->primaryModel), [
             'from' => [$tableName],
diff --git a/framework/db/ActiveRelationTrait.php b/framework/db/ActiveRelationTrait.php
index 8e4d87c8b9..a7c0eb33c2 100644
--- a/framework/db/ActiveRelationTrait.php
+++ b/framework/db/ActiveRelationTrait.php
@@ -99,7 +99,7 @@ trait ActiveRelationTrait
      * Its signature should be `function($query)`, where `$query` is the query to be customized.
      * @return static the relation object itself.
      */
-    public function via($relationName, $callable = null)
+    public function via($relationName, callable $callable = null)
     {
         $relation = $this->primaryModel->getRelation($relationName);
         $this->via = [$relationName, $relation];