diff --git a/lammps/force_lj.c b/lammps/force_lj.c
index 6218ded..68d6822 100644
--- a/lammps/force_lj.c
+++ b/lammps/force_lj.c
@@ -109,6 +109,9 @@ double computeForceLJHalfNeigh(Parameter *param, Atom *atom, Neighbor *neighbor,
     MD_FLOAT sigma6 = param->sigma6;
     MD_FLOAT epsilon = param->epsilon;
     #endif
+    const MD_FLOAT num1 = 1.0;
+    const MD_FLOAT num48 = 48.0;
+    const MD_FLOAT num05 = 0.5;
 
     for(int i = 0; i < Nlocal; i++) {
         atom_fx(i) = 0.0;
@@ -157,9 +160,9 @@ double computeForceLJHalfNeigh(Parameter *param, Atom *atom, Neighbor *neighbor,
             #endif
 
             if(rsq < cutforcesq) {
-                MD_FLOAT sr2 = 1.0 / rsq;
+                MD_FLOAT sr2 = num1 / rsq;
                 MD_FLOAT sr6 = sr2 * sr2 * sr2 * sigma6;
-                MD_FLOAT force = 48.0 * sr6 * (sr6 - 0.5) * sr2 * epsilon;
+                MD_FLOAT force = num48 * sr6 * (sr6 - num05) * sr2 * epsilon;
                 fix += delx * force;
                 fiy += dely * force;
                 fiz += delz * force;