diff --git a/code/modules/admin/modify_robot.dm b/code/modules/admin/modify_robot.dm
index 1ffcf78be2..dd749a2c36 100644
--- a/code/modules/admin/modify_robot.dm
+++ b/code/modules/admin/modify_robot.dm
@@ -151,7 +151,7 @@
 			target.crisis_override = !target.crisis_override
 			return TRUE
 		if("add_restriction")
-			target.restrict_modules_to += params["new_restriction"]
+			target.restrict_modules_to |= params["new_restriction"]
 			return TRUE
 		if("remove_restriction")
 			target.restrict_modules_to -= params["rem_restriction"]