diff --git a/include/teqp/models/multifluid.hpp b/include/teqp/models/multifluid.hpp
index 8c3db016bc82275a0affb9315c5473a4ab912582..7b74a0bb63a5bf8e653d597b21f054537a25fbc8 100644
--- a/include/teqp/models/multifluid.hpp
+++ b/include/teqp/models/multifluid.hpp
@@ -797,7 +797,7 @@ auto build_multifluid_mutant(Model& model, const nlohmann::json& jj) {
     return mfa;
 }
 
-template<class Model>
+template<typename Model>
 auto build_multifluid_mutant_invariant(Model& model, const nlohmann::json& jj) {
 
     auto red = model.redfunc;