diff --git a/nmcli-with-gsm.md b/nmcli-with-gsm.md
index 545e819..e1ccdfe 100644
--- a/nmcli-with-gsm.md
+++ b/nmcli-with-gsm.md
@@ -7,7 +7,7 @@ mmcli -L
 
 ## Enable modem
 ```
-mmcli -m 0 - e
+sudo mmcli -m 0 - e
 ```
 
 How to use nmcli to create a NetworkManager 4G connection