diff --git a/Classes/Definition/FlexForm/FlexFormDefinition.php b/Classes/Definition/FlexForm/FlexFormDefinition.php
index 39d10a52..506c2fd8 100644
--- a/Classes/Definition/FlexForm/FlexFormDefinition.php
+++ b/Classes/Definition/FlexForm/FlexFormDefinition.php
@@ -23,7 +23,7 @@
 final class FlexFormDefinition implements \IteratorAggregate
 {
     private string $contentBlockName = '';
-    private string $typeName = '';
+    private string|int $typeName = '';
 
     /**
      * @return \Iterator<SheetDefinition>
@@ -43,12 +43,12 @@ public function addSheet(SheetDefinition $sheet): void
         $this->sheets[] = $sheet;
     }
 
-    public function getTypeName(): string
+    public function getTypeName(): string|int
     {
         return $this->typeName;
     }
 
-    public function setTypeName(string $typeName): void
+    public function setTypeName(string|int $typeName): void
     {
         $this->typeName = $typeName;
     }