diff --git a/bin/pkcs11/pkcs11-destroy.c b/bin/pkcs11/pkcs11-destroy.c
index 2c0e97f10e..1d0eb21dea 100644
--- 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);
 	}