diff --git a/libs/random/include/psemek/random/normal.hpp b/libs/random/include/psemek/random/normal.hpp
index 65d8626a..cb761fb1 100644
--- a/libs/random/include/psemek/random/normal.hpp
+++ b/libs/random/include/psemek/random/normal.hpp
@@ -64,8 +64,8 @@ namespace psemek::random
 		T const r = std::sqrt(- 2 * std::log(u1));
 		T const th = 2 * geom::pi * u2;
 
-		T const z1 = r * std::cos(th);
-		T const z2 = r * std::sin(th);
+		T const z1 = mean_ + stddev_ * r * std::cos(th);
+		T const z2 = mean_ + stddev_ * r * std::sin(th);
 
 		cached_ = z2;
 		return z1;