diff --git a/src/net/addr/ether.cpp b/src/net/addr/ether.cpp
index e50a2ff..5266733 100644
--- a/src/net/addr/ether.cpp
+++ b/src/net/addr/ether.cpp
@@ -1 +1,6 @@
 #include <stdplus/net/addr/ether.hpp>
+
+namespace stdplus
+{
+template EtherAddr FromStr<EtherAddr>::operator()(std::string_view) const;
+}