diff --git a/thermo_val/model.py b/thermo_val/model.py
index 2b8bb221..1e9f2182 100644
--- a/thermo_val/model.py
+++ b/thermo_val/model.py
@@ -25,7 +25,7 @@ def predict_thermo(self, smiles):
 
         if self.kernel_type == 'GA':
             spec = Species().fromSMILES(smiles)
-            spec.generate_resonance_isomers()
+            spec.generate_resonance_structures()
 
             thermo = self.kernel.getThermoDataFromGroups(spec)