diff --git a/docs/user_guide.md b/docs/user_guide.md
index 9c942c3e6..322711202 100644
--- a/docs/user_guide.md
+++ b/docs/user_guide.md
@@ -57,7 +57,7 @@ Harbor supports different authentication modes:
 	
 	A user can register himself/herself in Harbor in this mode. To disable user self-registration, refer to the [installation guide](installation_guide.md) for initial configuration, or disable this feature in [Administrator Options](#administrator-options). When self-registration is disabled, the system administrator can add users into Harbor.  
 	
-	When registering or adding a new user, the username and email must be unique in the Harbor system. The password must contain at least 8 characters with 1 lowercase letter, 1 uppercase letter and 1 numeric character. The password cannot start with the pound sign `#`. 
+	When registering or adding a new user, the username and email must be unique in the Harbor system. The password must contain at least 8 characters with 1 lowercase letter, 1 uppercase letter and 1 numeric character.
 	
 	When you forgot your password, you can follow the below steps to reset the password: