diff --git a/src/android/org/linphone/assistant/AssistantActivity.java b/src/android/org/linphone/assistant/AssistantActivity.java
index 9fa218d5e..2f3aa0b81 100644
--- a/src/android/org/linphone/assistant/AssistantActivity.java
+++ b/src/android/org/linphone/assistant/AssistantActivity.java
@@ -359,7 +359,7 @@ private static AssistantActivity instance;
 
 		try {
 			String identity = proxyConfig.getIdentity();
-            if (identity == null) {
+            if (identity == null || accountCreator.getUsername() == null) {
                 LinphoneUtils.displayErrorAlert(getString(R.string.error), this);
                 return;
             }