diff --git a/include/ircd/spirit/spirit.h b/include/ircd/spirit/spirit.h
index 977c5bebf..d0079154b 100644
--- a/include/ircd/spirit/spirit.h
+++ b/include/ircd/spirit/spirit.h
@@ -39,6 +39,7 @@ __attribute__((visibility("internal")))
 	using spirit::auto_;
 	using spirit::_pass;
 	using spirit::_val;
+	using spirit::inf;
 
 	using qi::locals;
 	using qi::_a;