diff --git a/scenarios/labs/software_security_exploitation/5_linux_stack_bof.xml b/scenarios/labs/software_security_exploitation/5_linux_stack_bof.xml
index f1171719c..320df8c4b 100644
--- a/scenarios/labs/software_security_exploitation/5_linux_stack_bof.xml
+++ b/scenarios/labs/software_security_exploitation/5_linux_stack_bof.xml
@@ -73,6 +73,12 @@
           <input into="port">
             <value>31337</value>
           </input>
+          <input into="flag">
+            <generator type="flag_generator"/>
+            <generator type="flag_generator"/>
+            <generator type="flag_generator"/>
+            <generator type="flag_generator"/>
+          </input>
         </generator>
       </input>
     </utility>