diff --git a/build/vega-lite-schema.json b/build/vega-lite-schema.json
index c3f0ef212b7..87b858312c6 100644
--- a/build/vega-lite-schema.json
+++ b/build/vega-lite-schema.json
@@ -4933,7 +4933,7 @@
           "type": "array"
         },
         "summarize": {
-          "description": "Array of objects that contains aggregate information for the transform.",
+          "description": "Array of objects that each define an aggregation.",
           "items": {
             "$ref": "#/definitions/Summarize"
           },
diff --git a/src/transform.ts b/src/transform.ts
index 6cbfe8e07ac..9bd7cd56279 100644
--- a/src/transform.ts
+++ b/src/transform.ts
@@ -66,7 +66,7 @@ export interface TimeUnitTransform {
 
 export interface SummarizeTransform {
   /**
-   * Array of objects that contains aggregate information for the transform.
+   * Array of objects that each define an aggregation.
    */
   summarize: Summarize[];