diff --git a/config/utils.go b/config/utils.go
index 704cc80514..90e76b3fed 100644
--- a/config/utils.go
+++ b/config/utils.go
@@ -51,7 +51,7 @@ func desanitize(actual, target *model.Config) {
 		target.SqlSettings.DataSourceReplicas[i] = actual.SqlSettings.DataSourceReplicas[i]
 	}
 
-	target.SqlSettings.DataSourceSearchReplicas = make([]string, len(actual.SqlSettings.DataSourceReplicas))
+	target.SqlSettings.DataSourceSearchReplicas = make([]string, len(actual.SqlSettings.DataSourceSearchReplicas))
 	for i := range target.SqlSettings.DataSourceSearchReplicas {
 		target.SqlSettings.DataSourceSearchReplicas[i] = actual.SqlSettings.DataSourceSearchReplicas[i]
 	}