diff --git a/cmd.go b/cmd.go
index 8fbd66b..3fe7a06 100644
--- a/cmd.go
+++ b/cmd.go
@@ -129,8 +129,13 @@ var apiCmd = &cobra.Command{
 				),
 			)
 		case true:
-			//TODO
-			log.Printf("dbg: certfile='%s' keyfile='%s'", cfg.Server.API.TLS.Certfile, cfg.Server.API.TLS.Keyfile)
+			if cfg.Server.API.TLS.Certfile == "" {
+				log.Fatal("TLS enabled for API but no certificate file provided")
+			}
+
+			if cfg.Server.API.TLS.Keyfile == "" {
+				log.Fatal("TLS enabled for UI but no private key file provided")
+			}
 
 			e.Logger.Fatal(
 				e.StartTLS(