diff --git a/nodata.go b/nodata.go
index ba1e625..a6cba54 100644
--- a/nodata.go
+++ b/nodata.go
@@ -105,6 +105,7 @@ func nodataDatapoints() (datapoints []Datapoint, err error) {
 			FROM
 				datapoint
 			WHERE
+				nodata_problem_seconds > 0 AND
 				NOT nodata_is_problem AND
 				extract(EPOCH from (NOW() - last_value))::int > nodata_problem_seconds
 			) AS subquery