diff --git a/tests/system/shared/hook_utils.py b/tests/system/shared/hook_utils.py
index 736c21fb95204ab9a62f306a3a5c3cce69ae5d0e..7221be658661c78c97df406e2a71ba6dd0a71034 100644
--- a/tests/system/shared/hook_utils.py
+++ b/tests/system/shared/hook_utils.py
@@ -286,7 +286,7 @@ def deleteAppFromWinFW(workingDir, projectName, isReleaseBuild=True):
     if result == 0:
         test.log("Deleted %s from firewall" % projectName)
     else:
-        test.fatal("Could not delete %s as allowed program from win firewall" % (mode, projectName))
+        test.fatal("Could not delete %s as allowed program from win firewall" % (projectName))
 
 # helper that can modify the win firewall to allow a program to communicate through it or delete it
 # param addToFW defines whether to add (True) or delete (False) this programm to/from the firewall