diff --git a/addons/source-python/packages/source-python/weapons/restrictions.py b/addons/source-python/packages/source-python/weapons/restrictions.py
index bb1ba4995..fac063803 100644
--- a/addons/source-python/packages/source-python/weapons/restrictions.py
+++ b/addons/source-python/packages/source-python/weapons/restrictions.py
@@ -219,7 +219,7 @@ def add_player_restrictions(self, player, *weapons):
             as restricted for the player.
         """
         # Get the player's current restrictions
-        current_restrictions = self.player_restrictions[player.userid]
+        current_restrictions = self.player_restrictions[player.userid].copy()
 
         # Add the weapons to the player's restrictions
         self.player_restrictions[player.userid].update([