diff --git a/packages/core/__tests__/parseAmplifyOutputs.test.ts b/packages/core/__tests__/parseAmplifyOutputs.test.ts
index 7d15f7b1f52..3dba9c821a8 100644
--- a/packages/core/__tests__/parseAmplifyOutputs.test.ts
+++ b/packages/core/__tests__/parseAmplifyOutputs.test.ts
@@ -206,6 +206,14 @@ describe('parseAmplifyOutputs tests', () => {
 		expect(result.Auth?.Cognito.loginWith?.email).toBe(true);
 		expect(result.Auth?.Cognito.loginWith?.phone).toBe(true);
 		expect(result.Auth?.Cognito.loginWith?.username).toBe(false);
+
+		// Username
+		testAmplifyOutputs.auth.username_attributes = [];
+		result = parseAmplifyOutputs(testAmplifyOutputs);
+
+		expect(result.Auth?.Cognito.loginWith?.email).toBe(false);
+		expect(result.Auth?.Cognito.loginWith?.phone).toBe(false);
+		expect(result.Auth?.Cognito.loginWith?.username).toBe(true);
 	});
 
 	describe('storage tests', () => {
diff --git a/packages/core/src/parseAmplifyOutputs.ts b/packages/core/src/parseAmplifyOutputs.ts
index ed742189266..2995f63f172 100644
--- a/packages/core/src/parseAmplifyOutputs.ts
+++ b/packages/core/src/parseAmplifyOutputs.ts
@@ -141,7 +141,7 @@ function parseAuth(
 			email: username_attributes.includes('email'),
 			phone: username_attributes.includes('phone_number'),
 			// Signing in with a username is not currently supported in Gen2, this should always evaluate to false
-			username: username_attributes.includes('username'),
+			username: username_attributes.length === 0,
 		};
 	}