diff --git a/src/sipjs-card.ts b/src/sipjs-card.ts
index 2502452..dbaca24 100644
--- a/src/sipjs-card.ts
+++ b/src/sipjs-card.ts
@@ -405,7 +405,7 @@ class SipJsCard extends LitElement {
                     }
                 });
                 this.openPopup();
-                if (this.config.autoAnswer) {
+                if (this.config.auto_answer) {
                     await this.simpleUser.answer();
                     return;
                 }