diff --git a/js/twister_user.js b/js/twister_user.js
index e30308e..6755a80 100644
--- a/js/twister_user.js
+++ b/js/twister_user.js
@@ -183,7 +183,7 @@ function importSecretKeypress() {
 
 function importSecretKeyClick() {
     var secretKey = $(".secret-key-import").val();
-    var username = $(".username-import").val();
+    var username = $(".username-import").val().toLowerCase();
 
     twisterRpc("importprivkey", [secretKey,username],
                function(args, ret) {