diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index ce06e84b2fd..7d9d36b77b6 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -27225,7 +27225,7 @@ namespace ts {
             reference.expression.parent = reference;
             reference.parent = constructor;
             reference.flowNode = constructor.returnFlowNode;
-            const flowType = getFlowTypeOfReference(reference, getOptionalType(propType));
+            const flowType = getFlowTypeOfReference(reference, propType, getOptionalType(propType));
             return !(getFalsyFlags(flowType) & TypeFlags.Undefined);
         }