diff --git a/pkg/parser/parser.go b/pkg/parser/parser.go
index ed6f8052c..afc9f2bd1 100644
--- a/pkg/parser/parser.go
+++ b/pkg/parser/parser.go
@@ -241,7 +241,7 @@ func (e *expr) Metrics(from, until int64) []MetricRequest {
 				}
 				r = append(r, adjustedReq)
 			}
-		case "movingAverage", "movingMedian", "movingMin", "movingMax", "movingSum", "exponentialMovingAverage":
+		case "movingAverage", "movingMedian", "movingMin", "movingMax", "movingSum", "movingWindow", "exponentialMovingAverage":
 			if len(e.args) < 2 {
 				return nil
 			}