diff --git a/corrector.py b/corrector.py
index 8b514b74678a071eb1856ffdd9a2d69b2ec4e117..bf41327daf7057e375de61794af3110d406be493 100644
--- a/corrector.py
+++ b/corrector.py
@@ -194,7 +194,7 @@ def compute_lagrange_polynomial(points, prime_number):
         for j, (xj, _) in enumerate(points):
             if j != i:
                 Li_polynomial *= Polynomial((-xj, 1))
-                Li_polynomial *= Polynomial((modular_inverse(xi - xj, prime_number)))
+                Li_polynomial *= Polynomial((modular_inverse(xi - xj, prime_number),))
         Li_polynomial *= Polynomial((yi,))
         L_polynomial += Li_polynomial
     return L_polynomial % prime_number