diff --git a/cmd/helm/repo_list.go b/cmd/helm/repo_list.go
index 80ae887f4..37ae11fc0 100644
--- a/cmd/helm/repo_list.go
+++ b/cmd/helm/repo_list.go
@@ -107,7 +107,7 @@ func filterRepos(repos []*repo.Entry, ignoredRepoNames []string) []*repo.Entry {
 
 	filteredRepos := make([]*repo.Entry, 0)
 
-	ignored := make(map[string]bool, 0)
+	ignored := make(map[string]bool, len(ignoredRepoNames))
 	for _, repo := range ignoredRepoNames {
 		ignored[repo] = true
 	}