diff --git a/types/aws-lambda/aws-lambda-tests.ts b/types/aws-lambda/aws-lambda-tests.ts
index 2aa75090a4..61be5ea255 100644
--- a/types/aws-lambda/aws-lambda-tests.ts
+++ b/types/aws-lambda/aws-lambda-tests.ts
@@ -108,6 +108,7 @@ strOrNull = apiGwEvtReqCtx.identity.cognitoAuthenticationProvider;
 strOrNull = apiGwEvtReqCtx.identity.cognitoAuthenticationType;
 strOrNull = apiGwEvtReqCtx.identity.cognitoIdentityId;
 strOrNull = apiGwEvtReqCtx.identity.cognitoIdentityPoolId;
+strOrNull = apiGwEvtReqCtx.identity.principalOrgId;
 str = apiGwEvtReqCtx.identity.sourceIp;
 strOrNull = apiGwEvtReqCtx.identity.user;
 strOrNull = apiGwEvtReqCtx.identity.userAgent;
diff --git a/types/aws-lambda/index.d.ts b/types/aws-lambda/index.d.ts
index 3e2c467256..0420494f19 100644
--- a/types/aws-lambda/index.d.ts
+++ b/types/aws-lambda/index.d.ts
@@ -31,6 +31,7 @@
 //                 Juan Carbonel <https://github.com/juancarbonel>
 //                 Peter McIntyre <https://github.com/pwmcintyre>
 //                 Alex Bolenok <https://github.com/alex-bolenok-centralreach>
+//                 Marian Zange <https://github.com/marianzange>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.3
 
@@ -56,6 +57,7 @@ export interface APIGatewayEventRequestContext {
         cognitoAuthenticationType: string | null;
         cognitoIdentityId: string | null;
         cognitoIdentityPoolId: string | null;
+        principalOrgId: string | null;
         sourceIp: string;
         user: string | null;
         userAgent: string | null;