diff --git a/src/messages.c b/src/messages.c
index 671a5c49..f93ae90b 100644
--- a/src/messages.c
+++ b/src/messages.c
@@ -964,6 +964,7 @@ SSH_PACKET_CALLBACK(ssh_packet_userauth_info_response){
 
       goto error;
     }
+    SAFE_FREE(session->kbdint->answers[i]);
     session->kbdint->answers[i] = ssh_string_to_char(tmp);
     ssh_string_free(tmp);
     if (session->kbdint->answers[i] == NULL) {