diff --git a/mopidy_iris/system.py b/mopidy_iris/system.py
index 0d9e0f20..0b07128b 100755
--- a/mopidy_iris/system.py
+++ b/mopidy_iris/system.py
@@ -57,6 +57,6 @@ class IrisSystemThread(Thread):
 
         # Some kind of failure, so we can't run any commands this way
         if exitCode > 0:
-            raise Exception("Password-less access to "+path+"/system.sh was refused. Check your /etc/sudoers file.")
+            raise Exception("Password-less access to "+self.path+"/system.sh was refused. Check your /etc/sudoers file.")
         else:
             return True