diff --git a/src/ostree/ot-builtin-gpg-sign.c b/src/ostree/ot-builtin-gpg-sign.c
index 6c446ba3..9f596ec1 100644
--- a/src/ostree/ot-builtin-gpg-sign.c
+++ b/src/ostree/ot-builtin-gpg-sign.c
@@ -33,6 +33,7 @@ static char *opt_gpg_homedir;
 static GOptionEntry options[] = {
   { "delete", 'd', 0, G_OPTION_ARG_NONE, &opt_delete, "Delete signatures having any of the GPG KEY-IDs" },
   { "gpg-homedir", 0, 0, G_OPTION_ARG_STRING, &opt_gpg_homedir, "GPG Homedir to use when looking for keyrings", "HOMEDIR" },
+  { NULL }
 };
 
 static void