diff --git a/apps/hrmdataexport/hrmexp.js b/apps/hrmdataexport/hrmexp.js
index f78d3fbf6..ec5bf673f 100644
--- a/apps/hrmdataexport/hrmexp.js
+++ b/apps/hrmdataexport/hrmexp.js
@@ -3,7 +3,7 @@ var logging_started;
 var interval;
 var value;
 
-var file = require("Storage").open("hrm_log.csv", "w");
+var file = require("Storage").open("hrm_log.csv", "w+");
 file.write("");
 
 file = require("Storage").open("hrm_log.csv", "a");