diff --git a/src/pair_lj_smooth_linear.cpp b/src/pair_lj_smooth_linear.cpp
index b6dae6524a..bc2904c262 100644
--- a/src/pair_lj_smooth_linear.cpp
+++ b/src/pair_lj_smooth_linear.cpp
@@ -328,7 +328,7 @@ void PairLJSmoothLinear::read_restart_settings(FILE *fp)
 
 double PairLJSmoothLinear::single(int /*i*/, int /*j*/, int itype, int jtype,
                                   double rsq,
-                                  double factor_coul, double factor_lj,
+                                  double /*factor_coul*/, double factor_lj,
                                   double &fforce)
 {
   double r2inv,r6inv,forcelj,philj,r,rinv;