diff --git a/types/aws-lambda/aws-lambda-tests.ts b/types/aws-lambda/aws-lambda-tests.ts
index f3afac698db099..00b71132e9c45f 100644
--- a/types/aws-lambda/aws-lambda-tests.ts
+++ b/types/aws-lambda/aws-lambda-tests.ts
@@ -250,6 +250,9 @@ num = proxyResult.statusCode;
 proxyResult.headers!["example"] = str;
 proxyResult.headers!["example"] = bool;
 proxyResult.headers!["example"] = num;
+proxyResult.multiValueHeaders!["example"][0] = str;
+proxyResult.multiValueHeaders!["example"][0] = bool;
+proxyResult.multiValueHeaders!["example"][0] = num;
 boolOrUndefined = proxyResult.isBase64Encoded;
 str = proxyResult.body;
 
diff --git a/types/aws-lambda/index.d.ts b/types/aws-lambda/index.d.ts
index 9fa4ca2b305edf..d9d22f8c6568e4 100644
--- a/types/aws-lambda/index.d.ts
+++ b/types/aws-lambda/index.d.ts
@@ -60,7 +60,7 @@ export interface APIGatewayEventRequestContext {
 export interface APIGatewayProxyEvent {
     body: string | null;
     headers: { [name: string]: string };
-    multiValueHeaders: { [name: string]: string };
+    multiValueHeaders: { [name: string]: string[] };
     httpMethod: string;
     isBase64Encoded: boolean;
     path: string;
@@ -447,6 +447,9 @@ export interface APIGatewayProxyResult {
     headers?: {
         [header: string]: boolean | number | string;
     };
+    multiValueHeaders?: {
+        [header: string]: Array<boolean | number | string>;
+    };
     body: string;
     isBase64Encoded?: boolean;
 }