diff --git a/proto/ei-proto.c.tmpl b/proto/ei-proto.c.tmpl
index aab4735..4ede48a 100644
--- a/proto/ei-proto.c.tmpl
+++ b/proto/ei-proto.c.tmpl
@@ -73,6 +73,9 @@ const struct brei_object *
 int
 {{outgoing.fqdn}}({{interface.as_arg}}{%- for arg in outgoing.arguments %}, {{arg.as_arg}}{% endfor %})
 {
+	if (!{{interface.name}})
+		return -ENOENT;
+
 	const struct brei_object *obj = {{interface.name}}_get_proto_object({{interface.name}});
 	{{target.ctype}} ctx = {{interface.name}}_get_{{target.context}}({{interface.name}});