update usage message

diff --git a/bin/pkcs11/pkcs11-destroy.c b/bin/pkcs11/pkcs11-destroy.c
index 2c0e97f10e888666b2eee840fd8939ddecaf135f..1d0eb21dea1deff4546a098aac61c02983e20dd7 100644 (file)
--- a/bin/pkcs11/pkcs11-destroy.c
+++ b/bin/pkcs11/pkcs11-destroy.c
@@ -124,7 +124,7 @@ main(int argc, char *argv[]) {
        if (errflg || (id && (label != NULL))) {
                fprintf(stderr, "Usage:\n");
                fprintf(stderr, "\tpkcs11-destroy [-m module] [-s slot] "
-                               "[-i id | -l label] [-p pin] [-w waittime]\n");
+                               "{-i id | -l label} [-p pin] [-w waittime]\n");
                exit(1);
        }