diff --git a/app/src/main/java/fr/gouv/etalab/mastodon/activities/LoginActivity.java b/app/src/main/java/fr/gouv/etalab/mastodon/activities/LoginActivity.java
index b5383e4d3..6ea6148d0 100644
--- a/app/src/main/java/fr/gouv/etalab/mastodon/activities/LoginActivity.java
+++ b/app/src/main/java/fr/gouv/etalab/mastodon/activities/LoginActivity.java
@@ -263,7 +263,11 @@ public class LoginActivity extends BaseActivity {
                 parameters.put(Helper.CLIENT_ID, sharedpreferences.getString(Helper.CLIENT_ID, null));
                 parameters.put(Helper.CLIENT_SECRET, sharedpreferences.getString(Helper.CLIENT_SECRET, null));
                 parameters.put("grant_type", "password");
-                parameters.put("username",login_uid.getText().toString().trim());
+                try {
+                    parameters.put("username",URLEncoder.encode(login_uid.getText().toString().trim(), "UTF-8"));
+                } catch (UnsupportedEncodingException e) {
+                    parameters.put("username",login_uid.getText().toString().trim());
+                }
                 try {
                     parameters.put("password",URLEncoder.encode(login_passwd.getText().toString(), "UTF-8"));
                 } catch (UnsupportedEncodingException e) {