diff --git a/plugins/mm-modem-sierra-gsm.c b/plugins/mm-modem-sierra-gsm.c
index 5352761f..b5cf2f55 100644
--- a/plugins/mm-modem-sierra-gsm.c
+++ b/plugins/mm-modem-sierra-gsm.c
@@ -639,7 +639,7 @@ clear_user_pass (MMModemSierraGsm *self)
     g_free (priv->username);
     priv->username = NULL;
     g_free (priv->password);
-    priv->username = NULL;
+    priv->password = NULL;
 }
 
 static void