diff --git a/app/sso/services/mumblesql/__init__.py b/app/sso/services/mumblesql/__init__.py
index a5a0319..ace8dd0 100644
--- a/app/sso/services/mumblesql/__init__.py
+++ b/app/sso/services/mumblesql/__init__.py
@@ -53,7 +53,7 @@ class MumbleSQLService(BaseDBService):
         """ Check if the username exists """
         self.dbcursor.execute(self.SQL_CHECK_USER, [username])
         row = self.dbcursor.fetchone()
-        if row[0].lower() == username.lower():
+        if row and row[0].lower() == username.lower():
             return True        
         return False