diff --git a/pkg/query/api/v1.go b/pkg/query/api/v1.go
index ab127c7cc29..ae0a4e4eaf6 100644
--- a/pkg/query/api/v1.go
+++ b/pkg/query/api/v1.go
@@ -277,7 +277,9 @@ func (api *API) queryRange(r *http.Request) (interface{}, []error, *apiError) {
 		return nil, nil, &apiError{errorBadData, err}
 	}
 
-	maxSourceResolution := step / 5 // By default fit at least 5 samples between steps.
+	// TODO(bplotka): Enable downsampling by default (step / 5) once downsampling will be stable (experimental now).
+	// Details: https://github.com/improbable-eng/thanos/issues/376
+	maxSourceResolution := 0 * time.Second
 	if val := r.FormValue("max_source_resolution"); val != "" {
 		maxSourceResolution, err = parseDuration(val)
 		if err != nil {