diff --git a/src/pair_lj_cut.cpp b/src/pair_lj_cut.cpp
index becf294526..38a8261996 100644
--- a/src/pair_lj_cut.cpp
+++ b/src/pair_lj_cut.cpp
@@ -698,7 +698,7 @@ void PairLJCut::write_data_all(FILE *fp)
 {
   for (int i = 1; i <= atom->ntypes; i++)
     for (int j = i; j <= atom->ntypes; j++)
-      fprintf(fp,"%d %d %g %g %g\n",i,j,epsilon[i][i],sigma[i][i],cut[i][j]);
+      fprintf(fp,"%d %d %g %g %g\n",i,j,epsilon[i][j],sigma[i][j],cut[i][j]);
 }
 
 /* ---------------------------------------------------------------------- */