diff --git a/src/checks.c b/src/checks.c
index 61acb17..d91e239 100644
--- a/src/checks.c
+++ b/src/checks.c
@@ -3204,7 +3204,7 @@
 
  out_end_tcpcheck:
 	/* collect possible new errors */
-	if (conn->flags & CO_FL_ERROR || cs->flags & CS_FL_ERROR)
+	if ((conn && conn->flags & CO_FL_ERROR) || (cs && cs->flags & CS_FL_ERROR))
 		chk_report_conn_err(check, 0, 0);
 
 	/* cleanup before leaving */