diff --git a/src/OPT/pair_lj_charmm_coul_long_opt.h b/src/OPT/pair_lj_charmm_coul_long_opt.h
index fd594bb02a..cbd997ed63 100644
--- a/src/OPT/pair_lj_charmm_coul_long_opt.h
+++ b/src/OPT/pair_lj_charmm_coul_long_opt.h
@@ -32,11 +32,11 @@ namespace LAMMPS_NS {
 
 #define EWALD_F   1.12837917
 #define EWALD_P   0.3275911
-#define EWALD_A1  0.254829592
-#define EWALD_A2 -0.284496736
-#define EWALD_A3  1.421413741
-#define EWALD_A4 -1.453152027
-#define EWALD_A5  1.061405429
+#define A1        0.254829592
+#define A2       -0.284496736
+#define A3        1.421413741
+#define A4       -1.453152027
+#define A5        1.061405429
 
 #define MIN(a,b) ((a) < (b) ? (a) : (b))
 #define MAX(a,b) ((a) > (b) ? (a) : (b))
@@ -146,9 +146,7 @@ void PairLJCharmmCoulLongOpt::eval()
 	      grij = g_ewald * r;
 	      expm2 = exp(-grij*grij);
 	      t = 1.0 / (1.0 + EWALD_P*grij);
-	      erfc = t * 
-		(EWALD_A1+t*(EWALD_A2+t*(EWALD_A3+t*(EWALD_A4+t*EWALD_A5)))) * 
-		expm2;
+	      erfc = t * (A1+t*(A2+t*(A3+t*(A4+t*A5)))) * expm2;
 	      prefactor = qqrd2e * tmp_coef3/r;
 	      forcecoul = prefactor * (erfc + EWALD_F*grij*expm2);
 	    } else {
@@ -232,9 +230,7 @@ void PairLJCharmmCoulLongOpt::eval()
 	      grij = g_ewald * r;
 	      expm2 = exp(-grij*grij);
 	      t = 1.0 / (1.0 + EWALD_P*grij);
-	      erfc = t * 
-		(EWALD_A1+t*(EWALD_A2+t*(EWALD_A3+t*(EWALD_A4+t*EWALD_A5)))) * 
-		expm2;
+	      erfc = t * (A1+t*(A2+t*(A3+t*(A4+t*A5)))) * expm2;
 	      prefactor = qqrd2e * tmp_coef3/r;
 	      forcecoul = prefactor * (erfc + EWALD_F*grij*expm2);
 	      if (factor_coul < 1.0) {
@@ -320,6 +316,17 @@ void PairLJCharmmCoulLongOpt::eval()
 
   if (vflag_fdotr) virial_compute();
 }
+
+#undef EWALD_F
+#undef EWALD_P
+#undef A1
+#undef A2
+#undef A3
+#undef A4
+#undef A5
+
+#undef MIN
+#undef MAX
  
 }