diff --git a/app/Importer/UserImporter.php b/app/Importer/UserImporter.php
index 940c758f34..3177cee20e 100644
--- a/app/Importer/UserImporter.php
+++ b/app/Importer/UserImporter.php
@@ -3,6 +3,7 @@
 namespace App\Importer;
 
 use App\Models\Department;
+use App\Models\Setting;
 use App\Models\User;
 use App\Notifications\WelcomeNotification;
 
@@ -60,6 +61,13 @@ class UserImporter extends ItemImporter
         if ($this->shouldUpdateField($user_department)) {
             $this->item['department_id'] = $this->createOrFetchDepartment($user_department);
         }
+
+        if (is_null($this->item['username']) || $this->item['username'] == "") {
+            $user_full_name = $this->item['first_name'] . ' ' . $this->item['last_name'];
+            $user_formatted_array = User::generateFormattedNameFromFullName($user_full_name, Setting::getSettings()->username_format);
+            $this->item['username'] = $user_formatted_array['username'];
+        }
+        
         $user = User::where('username', $this->item['username'])->first();
         if ($user) {
             if (! $this->updating) {