diff --git a/src/net/addr/subnet.cpp b/src/net/addr/subnet.cpp
index d7cb24f..47f028f 100644
--- a/src/net/addr/subnet.cpp
+++ b/src/net/addr/subnet.cpp
@@ -15,6 +15,10 @@
 template class Subnet46<In4Addr, uint8_t>;
 template class Subnet46<In6Addr, uint8_t>;
 
+template Subnet4 SubnetFromStr<Subnet4>::operator()(std::string_view) const;
+template Subnet6 SubnetFromStr<Subnet6>::operator()(std::string_view) const;
+template SubnetAny SubnetFromStr<SubnetAny>::operator()(std::string_view) const;
+
 template char* SubnetToStr<Subnet4>::operator()(char*, Subnet4) const noexcept;
 template char* SubnetToStr<Subnet6>::operator()(char*, Subnet6) const noexcept;
 template char* SubnetToStr<SubnetAny>::operator()(char*,