diff --git a/include/ircd/logger.h b/include/ircd/logger.h
index e4ffeb742..67a925745 100644
--- a/include/ircd/logger.h
+++ b/include/ircd/logger.h
@@ -124,7 +124,7 @@ struct ircd::log::hook
 /// Lower level interface; this is not a template and defined in the unit.
 struct ircd::log::vlog
 {
-	vlog(const log &log, const level &, const string_view &fmt, const va_rtti &ap);
+	vlog(const log &log, const level &, const string_view &fmt, const va_rtti &ap) noexcept;
 };
 
 /// Lower level interface; allows log facility and level to be specified at
diff --git a/ircd/logger.cc b/ircd/logger.cc
index 03c801f5d..941e31c04 100644
--- a/ircd/logger.cc
+++ b/ircd/logger.cc
@@ -476,6 +476,7 @@ ircd::log::vlog::vlog(const log &log,
                       const level &lev,
                       const string_view &fmt,
                       const va_rtti &ap)
+noexcept
 {
 	if(!is_main_thread() && likely(ios::available()))
 	{