diff --git a/R/EMJMCMC2016-method-save_results_csv.R b/R/EMJMCMC2016-method-save_results_csv.R
index 703ebe5..1fbb344 100644
--- a/R/EMJMCMC2016-method-save_results_csv.R
+++ b/R/EMJMCMC2016-method-save_results_csv.R
@@ -1,6 +1,6 @@
 EMJMCMC2016$methods(
   # save big.data results, if the latter are available
-  save_results_csv = function(statistics1, filename) {
-    write.bigmemory::big.matrix(x = statistics1, filename = filename)
+  save_results_csv = function(statistics1, filename = tmpfile()) {
+    bigmemory::write.big.matrix(x = statistics1, filename = filename)
   }
 )