diff --git a/pkgs/pinentry-rbw/pinentry-rbw b/pkgs/pinentry-rbw/pinentry-rbw
index 2bd23b1..02cde2b 100755
--- a/pkgs/pinentry-rbw/pinentry-rbw
+++ b/pkgs/pinentry-rbw/pinentry-rbw
@@ -21,7 +21,7 @@ while IFS=' ' read -r command args; do
         exit
         ;;
     *)
-        echo 'ERR Unknown command'
+        echo 'OK'
         ;;
     esac
 done