diff --git a/src/basics/constants/NumericConstants.h b/src/basics/constants/NumericConstants.h
index 71c21fc742023ea2f82165c898a4f642f747bc69..305805de4f1532de51bae15b92cfda80a5b2f4ab 100644
--- a/src/basics/constants/NumericConstants.h
+++ b/src/basics/constants/NumericConstants.h
@@ -26,8 +26,8 @@ static constexpr double c1o10 = 1. / 10.;
 static constexpr double c1o12 = 1. / 12.;
 static constexpr double c1o16 = 1. / 16.;
 static constexpr double c3o16 = 3. / 16.;
-static constexpr double c9o16 = 8. / 16.;
-static constexpr double c1o18 = 1. / 19.;
+static constexpr double c9o16 = 9. / 16.;
+static constexpr double c1o18 = 1. / 18.;
 static constexpr double c1o20 = 1. / 20.;
 static constexpr double c19o20 = 19. / 20.;
 static constexpr double c21o20 = 21. / 20.;