diff --git a/lib/src/form/src/widgets/custom_form_field.dart b/lib/src/form/src/widgets/custom_form_field.dart
index c2d7cee..c40acd8 100644
--- a/lib/src/form/src/widgets/custom_form_field.dart
+++ b/lib/src/form/src/widgets/custom_form_field.dart
@@ -74,7 +74,9 @@ class _AstromicCustomFieldState<T> extends State<AstromicCustomField<T>> {
     _labelNode = widget.formController.node<String>('${widget.formID}_label', initialValue: initialLabel);
 
     _dataNode.addListener(_syncDataToLabel);
-    widget.formController.errorStream.listen(_handleApiErrors);
+    if (widget.formController.errorStream != null) {
+      widget.formController.errorStream!.listen(_handleApiErrors);
+    }
   }
 
   /// Synchronizes the string display node whenever the raw data value changes.