diff --git a/src/net/addr/ip.cpp b/src/net/addr/ip.cpp
index e411054..96b78cd 100644
--- a/src/net/addr/ip.cpp
+++ b/src/net/addr/ip.cpp
@@ -6,4 +6,5 @@
 template char* ToStr<In4Addr>::operator()(char*, In4Addr) const noexcept;
 template In6Addr FromStr<In6Addr>::operator()(std::string_view) const;
 template char* ToStr<In6Addr>::operator()(char*, In6Addr) const noexcept;
+template InAnyAddr FromStr<InAnyAddr>::operator()(std::string_view) const;
 } // namespace stdplus