diff --git a/specs/_features/eip7594/polynomial-commitments-sampling.md b/specs/_features/eip7594/polynomial-commitments-sampling.md
index 2eb5feacf3..870c4d68d0 100644
--- a/specs/_features/eip7594/polynomial-commitments-sampling.md
+++ b/specs/_features/eip7594/polynomial-commitments-sampling.md
@@ -256,7 +256,7 @@ def add_polynomialcoeff(a: PolynomialCoeff, b: PolynomialCoeff) -> PolynomialCoe
 ```python
 def neg_polynomialcoeff(a: PolynomialCoeff) -> PolynomialCoeff:
     """
-    Negative of coefficient form polynomial ``a``
+    Negative of coefficient form polynomial ``a``.
     """
     return PolynomialCoeff([-x for x in a])
 ```