diff --git a/include/boost/math/distributions/normal.hpp b/include/boost/math/distributions/normal.hpp
index f3776bc5f..69da2dc38 100644
--- a/include/boost/math/distributions/normal.hpp
+++ b/include/boost/math/distributions/normal.hpp
@@ -100,7 +100,7 @@ inline RealType pdf(const normal_distribution<RealType, Policy>& dist, const Rea
    {
      return 0; // pdf + and - infinity is zero.
    }
-   // Theis produces MSVC 4127 warnings, so the above used instead.
+   // Below produces MSVC 4127 warnings, so the above used instead.
    //if(std::numeric_limits<RealType>::has_infinity && abs(x) == std::numeric_limits<RealType>::infinity())
    //{ // pdf + and - infinity is zero.
    //  return 0;