diff --git a/pybop/models/empirical/ecm.py b/pybop/models/empirical/ecm.py
index 50b8008b..f831aee8 100644
--- a/pybop/models/empirical/ecm.py
+++ b/pybop/models/empirical/ecm.py
@@ -1,7 +1,6 @@
 from pybamm import equivalent_circuit as pybamm_equivalent_circuit
 
 from pybop.models.empirical.base_ecm import ECircuitModel
-from pybop.parameters.parameter import Inputs
 
 
 class Thevenin(ECircuitModel):