diff --git a/cmd/skopeo/completions.go b/cmd/skopeo/completions.go
index a50fadbc..672abc4b 100644
--- a/cmd/skopeo/completions.go
+++ b/cmd/skopeo/completions.go
@@ -7,9 +7,9 @@ import (
 )
 
 // autocompleteSupportedTransports list all supported transports with the colon suffix.
-func autocompleteSupportedTransports(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
+func autocompleteSupportedTransports(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
 	tps := transports.ListNames()
-	suggestions := make([]string, 0, len(tps))
+	suggestions := make([]cobra.Completion, 0, len(tps))
 	for _, tp := range tps {
 		// ListNames is generally expected to filter out deprecated transports.
 		// tarball: is not deprecated, but it is only usable from a Go caller (using tarball.ConfigUpdater),