diff --git a/drivers/modem/modem_socket.c b/drivers/modem/modem_socket.c
index c388c24ad5..1f209fbca4 100644
--- a/drivers/modem/modem_socket.c
+++ b/drivers/modem/modem_socket.c
@@ -238,6 +238,7 @@ void modem_socket_put(struct modem_socket_config *cfg, int sock_fd)
 	sock->sock_fd = -1;
 	sock->is_waiting = false;
 	sock->is_polled = false;
+	sock->is_connected = false;
 	(void)memset(&sock->src, 0, sizeof(struct sockaddr));
 	(void)memset(&sock->dst, 0, sizeof(struct sockaddr));
 
diff --git a/drivers/modem/modem_socket.h b/drivers/modem/modem_socket.h
index edda1f1085..055c7b997c 100644
--- a/drivers/modem/modem_socket.h
+++ b/drivers/modem/modem_socket.h
@@ -40,6 +40,7 @@ struct modem_socket {
 	struct k_sem sem_data_ready;
 
 	/** socket state */
+	bool is_connected;
 	bool is_waiting;
 	bool is_polled;