diff --git a/src/TransientFETools/TransientFEOperators.jl b/src/TransientFETools/TransientFEOperators.jl
index 7afb4b2..1234948 100644
--- a/src/TransientFETools/TransientFEOperators.jl
+++ b/src/TransientFETools/TransientFEOperators.jl
@@ -84,10 +84,10 @@ struct TransientFEOperatorFromTerms <: TransientFEOperator
   trial_t
   test::FESpace
   assem_t::Assembler
-  terms
   type::OperatorType
-  function TransientFEOperatorFromTerms(trial,trial_t,test::FESpace,assem::Assembler,terms...)
-    new(trial,trial_t,test,assem,Nonlinear(),terms...)
+  terms
+  function TransientFEOperatorFromTerms(trial,trial_t,test::FESpace,assem::Assembler,optype,terms...)
+    new(trial,trial_t,test,assem,optype,terms...)
   end
 end