diff --git a/src/types/index.ts b/src/types/index.ts
index d3b6011..bc2c01a 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -591,7 +591,7 @@ export interface ClaimDetail {
    * ``adjustmentsSum`` are null when the line has no matched 835 SVC
    * composite.
    */
-  lineReconciliation: ClaimDetailLineReconciliation[];
+  lineReconciliation?: ClaimDetailLineReconciliation[];
 }
 
 // ---------------------------------------------------------------------------