diff --git a/filter/filters_circleci.go b/filter/filters_circleci.go
index b5286f97..b6ebcc70 100644
--- a/filter/filters_circleci.go
+++ b/filter/filters_circleci.go
@@ -35,3 +35,7 @@ import (
 func NewMOGFilter(dst io.WriteCloser, area, threshold float64, history, kernelSize int, debug bool) *NoOp {
 	return &NoOp{dst: dst}
 }
+
+func NewKNNFilter(dst io.WriteCloser, area, threshold float64, history, kernelSize int, debug bool) *KNNFilter {
+	return &NoOp{dst: dst}
+}
diff --git a/filter/knn.go b/filter/knn.go
index 3e494253..d4eb13ed 100644
--- a/filter/knn.go
+++ b/filter/knn.go
@@ -1,4 +1,6 @@
 /*
+// +build !circleci
+
 DESCRIPTION
   A filter that detects motion and discards frames without motion. The
   filter uses a K-Nearest Neighbours (KNN) to determine what is