diff --git a/lib/storage/index_db.go b/lib/storage/index_db.go
index 87fc4c4948..97e42acadb 100644
--- a/lib/storage/index_db.go
+++ b/lib/storage/index_db.go
@@ -1893,7 +1893,7 @@ func (is *indexSearch) searchMetricIDs(tfss []*TagFilters, tr TimeRange, maxMetr
 				return nil, err
 			}
 			if metricIDs.Len() > maxMetrics {
-				return nil, fmt.Errorf("the number or unique timeseries exceeds %d; either narrow down the search or increase -search.maxUniqueTimeseries", maxMetrics)
+				return nil, fmt.Errorf("the number of unique timeseries exceeds %d; either narrow down the search or increase -search.maxUniqueTimeseries", maxMetrics)
 			}
 			// Stop the iteration, since we cannot find more metric ids with the remaining tfss.
 			break
@@ -1902,7 +1902,7 @@ func (is *indexSearch) searchMetricIDs(tfss []*TagFilters, tr TimeRange, maxMetr
 			return nil, err
 		}
 		if metricIDs.Len() > maxMetrics {
-			return nil, fmt.Errorf("the number or matching unique timeseries exceeds %d; either narrow down the search or increase -search.maxUniqueTimeseries", maxMetrics)
+			return nil, fmt.Errorf("the number of matching unique timeseries exceeds %d; either narrow down the search or increase -search.maxUniqueTimeseries", maxMetrics)
 		}
 	}
 	if metricIDs.Len() == 0 {