diff --git a/packages/aws-cdk/lib/logging.ts b/packages/aws-cdk/lib/logging.ts
index 97d0b427158fd..813379078b897 100644
--- a/packages/aws-cdk/lib/logging.ts
+++ b/packages/aws-cdk/lib/logging.ts
@@ -39,7 +39,7 @@ export function data(fmt: string, ...args: any[]) {
     console.log(util.format(fmt, ...args));
 }
 
-type LoggerFunction = (fmt: string, ...args: any[]) => void;
+export type LoggerFunction = (fmt: string, ...args: any[]) => void;
 
 /**
  * Create a logger output that features a constant prefix string.
diff --git a/packages/aws-cdk/lib/renames.ts b/packages/aws-cdk/lib/renames.ts
index 413f2ec8712db..0c54b2d634cc0 100644
--- a/packages/aws-cdk/lib/renames.ts
+++ b/packages/aws-cdk/lib/renames.ts
@@ -1,7 +1,7 @@
 import cxapi = require('@aws-cdk/cx-api');
 import util = require('@aws-cdk/util');
 
-type RenameTable = {[key: string]: string};
+export type RenameTable = {[key: string]: string};
 
 /**
  * A class used to maintain a set of rename directives