diff --git a/contrib/pam_zfs_key/pam_zfs_key.c b/contrib/pam_zfs_key/pam_zfs_key.c
index 703d0ad57f..4b89091cda 100644
--- a/contrib/pam_zfs_key/pam_zfs_key.c
+++ b/contrib/pam_zfs_key/pam_zfs_key.c
@@ -768,7 +768,9 @@ pam_sm_close_session(pam_handle_t *pamh, int flags,
 		return (PAM_SUCCESS);
 	}
 	zfs_key_config_t config;
-	zfs_key_config_load(pamh, &config, argc, argv);
+	if (zfs_key_config_load(pamh, &config, argc, argv) != 0) {
+		return (PAM_SESSION_ERR);
+	}
 	if (config.uid < 1000) {
 		zfs_key_config_free(&config);
 		return (PAM_SUCCESS);