diff --git a/src/Illuminate/Database/Query/Builder.php b/src/Illuminate/Database/Query/Builder.php
index f5c40f841b97..0b45dd2994f1 100755
--- a/src/Illuminate/Database/Query/Builder.php
+++ b/src/Illuminate/Database/Query/Builder.php
@@ -510,7 +510,7 @@ public function ignoreIndex($index)
      * Add a join clause to the query.
      *
      * @param  \Illuminate\Contracts\Database\Query\Expression|string  $table
-     * @param  \Closure|string  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
      * @param  string|null  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
      * @param  string  $type
@@ -550,7 +550,7 @@ public function join($table, $first, $operator = null, $second = null, $type = '
      * Add a "join where" clause to the query.
      *
      * @param  \Illuminate\Contracts\Database\Query\Expression|string  $table
-     * @param  \Closure|string  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
      * @param  string  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string  $second
      * @param  string  $type
@@ -566,7 +566,7 @@ public function joinWhere($table, $first, $operator, $second, $type = 'inner')
      *
      * @param  \Closure|\Illuminate\Database\Query\Builder|\Illuminate\Database\Eloquent\Builder|string  $query
      * @param  string  $as
-     * @param  \Closure|string  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
      * @param  string|null  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
      * @param  string  $type
@@ -623,7 +623,7 @@ public function leftJoinLateral($query, string $as)
      * Add a left join to the query.
      *
      * @param  \Illuminate\Contracts\Database\Query\Expression|string  $table
-     * @param  \Closure|string  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
      * @param  string|null  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
      * @return $this
@@ -637,7 +637,7 @@ public function leftJoin($table, $first, $operator = null, $second = null)
      * Add a "join where" clause to the query.
      *
      * @param  \Illuminate\Contracts\Database\Query\Expression|string  $table
-     * @param  \Closure|string  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
      * @param  string  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
      * @return $this
@@ -652,7 +652,7 @@ public function leftJoinWhere($table, $first, $operator, $second)
      *
      * @param  \Closure|\Illuminate\Database\Query\Builder|\Illuminate\Database\Eloquent\Builder|string  $query
      * @param  string  $as
-     * @param  \Closure|string  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
      * @param  string|null  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
      * @return $this
@@ -680,7 +680,7 @@ public function rightJoin($table, $first, $operator = null, $second = null)
      * Add a "right join where" clause to the query.
      *
      * @param  \Illuminate\Contracts\Database\Query\Expression|string  $table
-     * @param  \Closure|string  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
      * @param  string  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string  $second
      * @return $this
@@ -695,7 +695,7 @@ public function rightJoinWhere($table, $first, $operator, $second)
      *
      * @param  \Closure|\Illuminate\Database\Query\Builder|\Illuminate\Database\Eloquent\Builder|string  $query
      * @param  string  $as
-     * @param  \Closure|string  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
      * @param  string|null  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
      * @return $this
@@ -709,7 +709,7 @@ public function rightJoinSub($query, $as, $first, $operator = null, $second = nu
      * Add a "cross join" clause to the query.
      *
      * @param  \Illuminate\Contracts\Database\Query\Expression|string  $table
-     * @param  \Closure|string|null  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string|null  $first
      * @param  string|null  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
      * @return $this
@@ -1029,7 +1029,7 @@ public function orWhereNot($column, $operator = null, $value = null)
     /**
      * Add a "where" clause comparing two columns to the query.
      *
-     * @param  string|array  $first
+     * @param  \Illuminate\Contracts\Database\Query\Expression|string|array  $first
      * @param  string|null  $operator
      * @param  string|null  $second
      * @param  string|null  $boolean
@@ -1066,7 +1066,7 @@ public function whereColumn($first, $operator = null, $second = null, $boolean =
     /**
      * Add an "or where" clause comparing two columns to the query.
      *
-     * @param  string|array  $first
+     * @param  \Illuminate\Contracts\Database\Query\Expression|string|array  $first
      * @param  string|null  $operator
      * @param  string|null  $second
      * @return $this
diff --git a/src/Illuminate/Database/Query/JoinClause.php b/src/Illuminate/Database/Query/JoinClause.php
index aef1c9aa547d..37a002c57245 100755
--- a/src/Illuminate/Database/Query/JoinClause.php
+++ b/src/Illuminate/Database/Query/JoinClause.php
@@ -82,7 +82,7 @@ public function __construct(Builder $parentQuery, $type, $table)
      *
      * on `contacts`.`user_id` = `users`.`id` and `contacts`.`info_id` = `info`.`id`
      *
-     * @param  \Closure|string  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
      * @param  string|null  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
      * @param  string  $boolean
@@ -102,7 +102,7 @@ public function on($first, $operator = null, $second = null, $boolean = 'and')
     /**
      * Add an "or on" clause to the join.
      *
-     * @param  \Closure|string  $first
+     * @param  \Closure|\Illuminate\Contracts\Database\Query\Expression|string  $first
      * @param  string|null  $operator
      * @param  \Illuminate\Contracts\Database\Query\Expression|string|null  $second
      * @return \Illuminate\Database\Query\JoinClause