diff --git a/src/Ast/FunctionReturnType.php b/src/Ast/FunctionReturnType.php
index 19cdf84..d271d07 100644
--- a/src/Ast/FunctionReturnType.php
+++ b/src/Ast/FunctionReturnType.php
@@ -52,7 +52,7 @@ public function toString()
 		public static function parse(NodeParser $parser)
 		{
 			$indentation = $parser->consumeNodeIndentation();
-			$parser->consumeAsUnknowContent(':');
+			$parser->consumeAsIndentation(':');
 			$parser->consumeWhitespace();
 			$indentation .= $parser->flushIndentation();
 			$nullable = FALSE;
diff --git a/tests/PhpSimpleAst/fixtures/PHP-8.0/80000.union-types.dump b/tests/PhpSimpleAst/fixtures/PHP-8.0/80000.union-types.dump
index f5dc6e3..5d32e03 100644
--- a/tests/PhpSimpleAst/fixtures/PHP-8.0/80000.union-types.dump
+++ b/tests/PhpSimpleAst/fixtures/PHP-8.0/80000.union-types.dump
@@ -82,7 +82,7 @@ CzProject\PhpSimpleAst\Ast\PhpString
    |  |  |  |  |  |  |  |  |  defaultValue: null
    |  |  |  |  |  |  |  closer: ')'
    |  |  |  |  |  |  returnType: CzProject\PhpSimpleAst\Ast\FunctionReturnType
-   |  |  |  |  |  |  |  indentation: ' '
+   |  |  |  |  |  |  |  indentation: ': '
    |  |  |  |  |  |  |  nullable: false
    |  |  |  |  |  |  |  type: CzProject\PhpSimpleAst\Ast\Type
    |  |  |  |  |  |  |  |  indentation: ''