diff --git a/src/Psalm/Internal/Scanner/FunctionDocblockComment.php b/src/Psalm/Internal/Scanner/FunctionDocblockComment.php
index f01f72474..58748aa46 100644
--- a/src/Psalm/Internal/Scanner/FunctionDocblockComment.php
+++ b/src/Psalm/Internal/Scanner/FunctionDocblockComment.php
@@ -42,9 +42,9 @@ class FunctionDocblockComment
     public $params_out = [];
 
     /**
-     * @var array{type:string, line_number: int}
+     * @var array{type:string, line_number: int}|null
      */
-    public $self_out = [];
+    public $self_out;
 
     /**
      * @var array<int, array{name:string, type:string, line_number: int}>