diff --git a/generate/sam-2016-10-31.json b/generate/sam-2016-10-31.json
index 00ee01eda0..a1bee8548e 100644
--- a/generate/sam-2016-10-31.json
+++ b/generate/sam-2016-10-31.json
@@ -2085,7 +2085,7 @@
                     "Documentation": "https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-api-domainconfiguration.html#sam-api-domainconfiguration-basepath",
                     "Required": false,
                     "Type": "List",
-                    "ItemType": "String",
+                    "PrimitiveItemType": "String",
                     "UpdateType": "Immutable"
                 },
                 "CertificateArn": {