diff --git a/swupd-probe.c b/swupd-probe.c
index bc23b2c..1c5077a 100644
--- a/swupd-probe.c
+++ b/swupd-probe.c
@@ -117,6 +117,8 @@ static void deliver_payload(const char *filename)
 			exit(EXIT_FAILURE);
 		}
 
+		close(fd);
+
 		/* drop privileges */
 		if (setgroups(0, NULL)) {
 			perror("setgroups");