diff --git a/packages/amplify_auth_cognito/android/src/main/kotlin/com/amazonaws/amplify/amplify_auth_cognito/types/FlutterFetchCognitoAuthSessionResult.kt b/packages/amplify_auth_cognito/android/src/main/kotlin/com/amazonaws/amplify/amplify_auth_cognito/types/FlutterFetchCognitoAuthSessionResult.kt
index 949ae69a1f..b8f1699405 100644
--- a/packages/amplify_auth_cognito/android/src/main/kotlin/com/amazonaws/amplify/amplify_auth_cognito/types/FlutterFetchCognitoAuthSessionResult.kt
+++ b/packages/amplify_auth_cognito/android/src/main/kotlin/com/amazonaws/amplify/amplify_auth_cognito/types/FlutterFetchCognitoAuthSessionResult.kt
@@ -32,7 +32,7 @@ data class FlutterFetchCognitoAuthSessionResult(private val raw: AWSCognitoAuthS
   private val tokens: AuthSessionResult<AWSCognitoUserPoolTokens>? = raw.userPoolTokens
 
   fun toValueMap(): Map<String, Any?> {
-    var serializedMap = mutableMapOf(
+    var serializedMap = mutableMapOf<String, Any?>(
       "isSignedIn" to this.isSignedIn,
       "identityId" to this.identityId,
       "userSub" to this.userSub