diff --git a/cmd/csaf_validator/main.go b/cmd/csaf_validator/main.go
index b07c2f4..6985509 100644
--- a/cmd/csaf_validator/main.go
+++ b/cmd/csaf_validator/main.go
@@ -69,6 +69,8 @@ func run(opts *options, files []string) error {
 				"preparing remote validator failed: %w", err)
 		}
 		defer validator.Close()
+	} else {
+		log.Printf("warn: no remote validator specified")
 	}
 
 	// Select amount level of output for remote validation.