diff --git a/bin/cryptobox.pl b/bin/cryptobox.pl
index 9eb7ccb..7f36806 100755
--- a/bin/cryptobox.pl
+++ b/bin/cryptobox.pl
@@ -284,7 +284,7 @@ sub check_init_running {
 
 # Parameter: device
 sub check_device_plaintext {
-	return (system("$CB_SCRIPT","is_plaintext",$1) == 0);
+	return (system("$CB_SCRIPT","is_plain",$1) == 0);
 }