diff --git a/pkg/tsdb/prometheus/prometheus.go b/pkg/tsdb/prometheus/prometheus.go
index 1244031bb4..c1d85b7e53 100644
--- a/pkg/tsdb/prometheus/prometheus.go
+++ b/pkg/tsdb/prometheus/prometheus.go
@@ -112,10 +112,10 @@ func (e *PrometheusExecutor) Query(ctx context.Context, dsInfo *models.DataSourc
 		span.SetTag("stop_unixnano", query.End.UnixNano())
 		defer span.Finish()
 
-		value, _, err := client.QueryRange(ctx, query.Expr, timeRange)
+		value, queryErr := client.QueryRange(ctx, query.Expr, timeRange)
 
-		if err != nil {
-			return nil, err
+		if queryErr != nil {
+			return nil, queryErr
 		}
 
 		queryResult, err := parseResponse(value, query)