diff --git a/packages/@aws-cdk/aws-cloudfront/lib/web_distribution.ts b/packages/@aws-cdk/aws-cloudfront/lib/web_distribution.ts
index 40a01ad6b653f..493263191e4b0 100644
--- a/packages/@aws-cdk/aws-cloudfront/lib/web_distribution.ts
+++ b/packages/@aws-cdk/aws-cloudfront/lib/web_distribution.ts
@@ -237,7 +237,7 @@ export interface S3OriginConfig {
   /**
    * The source bucket to serve content from
    */
-  readonly s3BucketSource: s3.Bucket,
+  readonly s3BucketSource: s3.IBucket,
 
   /**
    * The optional origin identity cloudfront will use when calling your s3 bucket.