diff --git a/src/main.c b/src/main.c
index 6ae47e8..23fa9d2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -46,4 +46,5 @@
 	g_ctx = talloc_named_const(NULL, 0, "main");
 	talloc_asn1_ctx = talloc_named_const(g_ctx, 0, "asn1_context");
 	card_readers_probe(g_ctx);
+	return 0;
 }