diff --git a/types/pg/index.d.ts b/types/pg/index.d.ts
index 1383dc2a22..ec5b929aa4 100644
--- a/types/pg/index.d.ts
+++ b/types/pg/index.d.ts
@@ -15,6 +15,7 @@ export interface ConnectionConfig {
     password?: string;
     port?: number;
     host?: string;
+    connectionString?: string;
 }
 
 export interface Defaults extends ConnectionConfig {
diff --git a/types/pg/pg-tests.ts b/types/pg/pg-tests.ts
index bc1bfd30e0..1f1e312544 100644
--- a/types/pg/pg-tests.ts
+++ b/types/pg/pg-tests.ts
@@ -77,6 +77,10 @@ client.end()
   .then(() => console.log('client has disconnected'))
   .catch(err => console.error('error during disconnection', err.stack));
 
+const poolOne = new pg.Pool({
+  connectionString: 'postgresql://dbuser:secretpassword@database.server.com:3211/mydb'
+});
+
 const pool = new pg.Pool({
   host: 'localhost',
   port: 5432,