diff --git a/src/math_const.h b/src/math_const.h
index 2434e5cdc1..5cbc2aee28 100644
--- a/src/math_const.h
+++ b/src/math_const.h
@@ -18,8 +18,6 @@ namespace LAMMPS_NS {
 
 namespace MathConst {
   static const double THIRD  = 1.0/3.0;
-  static const double MY_3PI = 9.42477796076937971538; // 3pi
-  static const double MY_2PI = 6.28318530717958647692; // 2pi
   static const double MY_PI  = 3.14159265358979323846; // pi
   static const double MY_2PI = 6.28318530717958647692; // 2pi
   static const double MY_3PI = 9.42477796076937971538; // 3pi