diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8d048b6..8836485 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -75,6 +75,7 @@ v1.8.11 [unreleased]
 -------------------
 
 -	[#21659](https://github.com/influxdata/influxdb/pull/21659): fix: do not close connection twice in DigestWithOptions
+-	[#21666](https://github.com/influxdata/influxdb/pull/21666): fix: do not panic on cleaning up failed iterators
 
 v1.8.10 [2021-10-11]
 -------------------
diff --git a/query/iterator.go b/query/iterator.go
index 79a84a3..6706a6b 100644
--- a/query/iterator.go
+++ b/query/iterator.go
@@ -43,11 +43,22 @@ func (a Iterators) Stats() IteratorStats {
 }
 
 // Close closes all iterators.
-func (a Iterators) Close() error {
+// We are seeing an occasional panic in this function
+// which looks like a nil reference from one
+// itr.Close() call, thus we check for nil elements
+// in the slice a.  This is often called as error
+// clean-up, so the state of the iterators may be
+// unhappy.
+func (a Iterators) Close() (err error) {
+	err = nil
 	for _, itr := range a {
-		itr.Close()
+		if itr != nil {
+			if e := itr.Close(); e != nil && err == nil {
+				err = e
+			}
+		}
 	}
-	return nil
+	return err
 }
 
 // filterNonNil returns a slice of iterators that removes all nil iterators.