diff --git a/localization_log_gamma_model.py b/localization_log_gamma_model.py
index d8dd054..0306d0c 100644
--- a/localization_log_gamma_model.py
+++ b/localization_log_gamma_model.py
@@ -121,7 +121,7 @@ def main(args):
     # prepare
     if args.outputfile:
         with open(args.outputfile, 'w') as f:
-            f.write("filename,true_x,true_y,est_tx_x,est_tx_y,tx_pwr,env_gamma,fit_mse,rss_diff_5perc,rss_diff_95perc,rss_diff_med,rss_diff_avg\n")
+            f.write("filename,true_x,true_y,est_tx_x,est_tx_y,error,est_tx_pwr,env_gamma,fit_mse,rss_diff_5perc,rss_diff_95perc,rss_diff_med,rss_diff_avg\n")
 
 
     # loop through and fit