diff --git a/app/comp/res_classic.py b/app/comp/res_classic.py
index 2caf515c5..543772d3e 100644
--- a/app/comp/res_classic.py
+++ b/app/comp/res_classic.py
@@ -60,7 +60,7 @@ class ResultatsSemestreClassic(NotesTableCompat):
         )
         self.modimpl_inscr_df = inscr_mod.df_load_modimpl_inscr(self.formsemestre)
         self.modimpl_coefs = np.array(
-            [m.module.coefficient for m in self.formsemestre.modimpls_sorted]
+            [m.module.coefficient or 0.0 for m in self.formsemestre.modimpls_sorted]
         )
         self.modimpl_idx = {
             m.id: i for i, m in enumerate(self.formsemestre.modimpls_sorted)