diff --git a/promql/engine.go b/promql/engine.go
index 68b87a5de..41f9238a1 100644
--- a/promql/engine.go
+++ b/promql/engine.go
@@ -779,20 +779,6 @@ func (ev *evaluator) vectorSelector(node *VectorSelector) Vector {
 		if value.IsStaleNaN(v) {
 			continue
 		}
-		// Find timestamp before this point, within the staleness delta.
-		prevT, _, ok := it.PeekBack(peek)
-		if ok && prevT >= refTime-durationMilliseconds(LookbackDelta) {
-			interval := t - prevT
-			if interval*4+interval/10 < refTime-t {
-				// It is more than 4 (+10% for safety) intervals
-				// since the last data point, skip as stale.
-				//
-				// We need 4 to allow for federation, as with a 10s einterval an eval
-				// started at t=10 could be ingested at t=20, scraped for federation at
-				// t=30 and only ingested by federation at t=40.
-				continue
-			}
-		}
 
 		vec = append(vec, Sample{
 			Metric: node.series[i].Labels(),
diff --git a/promql/testdata/staleness.test b/promql/testdata/staleness.test
index 9c24fe31c..76ee2f287 100644
--- a/promql/testdata/staleness.test
+++ b/promql/testdata/staleness.test
@@ -13,11 +13,11 @@ eval instant at 30s metric
 eval instant at 40s metric
   {__name__="metric"} 2
 
-# It goes stale 4 intervals + 10% after the last sample.
-eval instant at 71s metric
+# It goes stale 5 minutes after the last sample.
+eval instant at 330s metric
   {__name__="metric"} 2
 
-eval instant at 72s metric
+eval instant at 331s metric
 
 
 # Range vector ignores stale sample.