diff --git a/check-users.c b/check-users.c
index 2dfeed7..4ded587 100644
--- a/check-users.c
+++ b/check-users.c
@@ -30,11 +30,11 @@ void check_users() {
 		res_err_txt = strerror(res_errno);
 		char *notification_payload;
 		int notification_payload_len;
-		const char *notification_payload_fmt = "samuel doesn't exist, LDAP is probably broken somehow. (getpwnam returned %s)";
+		const char *notification_payload_fmt = "samuel doesn't exist, LDAP is probably broken somehow. (getpwnam returned errno %s/%d)";
 		/* TODO: set a realistic payload length */
 		notification_payload_len = strlen(notification_payload_fmt) + strlen(res_err_txt) + 1;
 		notification_payload = malloc(notification_payload_len+1);
-		snprintf(notification_payload, notification_payload_len, notification_payload_fmt, res_err_txt);
+		snprintf(notification_payload, notification_payload_len, notification_payload_fmt, res_err_txt, res_errno);
 		int send_alarm_result;
 		send_alarm_result = send_alarm(notification_payload);
 		/* We only set this to 1 if we successfully reported the issue. */