diff --git a/components/var_dumper.rst b/components/var_dumper.rst
index bc14c970fa9..56da6d2f5da 100644
--- a/components/var_dumper.rst
+++ b/components/var_dumper.rst
@@ -627,7 +627,7 @@ For example, to get a dump as a string in a variable, you can do::
 
     $dumper->dump(
         $cloner->cloneVar($variable),
-        function (int $line, int $depth) use (&$output): void {
+        function (string $line, int $depth) use (&$output): void {
             // A negative depth means "end of dump"
             if ($depth >= 0) {
                 // Adds a two spaces indentation to the line