1 files changed, 2 insertions, 3 deletions
diff --git a/src/fields/Doc.ts b/src/fields/Doc.ts
index b3a17de8f..60cf8b321 100644
--- a/src/fields/Doc.ts
+++ b/src/fields/Doc.ts
@@ -97,9 +97,8 @@ export namespace Field {
         });
         return script;
     }
-    export function toString(fieldIn: unknown) {
-        const field = fieldIn as FieldType;
-        if (typeof field === 'string' || typeof field === 'number' || typeof field === 'boolean') return String(field);
+    export function toString(field: FieldResult<FieldType> | FieldType | undefined) {
+        if (field instanceof Promise || typeof field === 'string' || typeof field === 'number' || typeof field === 'boolean') return String(field);
         return field?.[ToString]?.() || '';
     }
     export function IsField(field: unknown): field is FieldType;