diff --git a/libfprint/fpi-poll.c b/libfprint/fpi-poll.c
index ee7d86d5..b51fcb7d 100644
--- a/libfprint/fpi-poll.c
+++ b/libfprint/fpi-poll.c
@@ -413,7 +413,7 @@ void fpi_poll_init(void)
 
 void fpi_poll_exit(void)
 {
-	g_slist_free(active_timers);
+	g_slist_free_full(active_timers, g_free);
 	active_timers = NULL;
 	fd_added_cb = NULL;
 	fd_removed_cb = NULL;