diff --git a/scripts/bug_mining.py b/scripts/bug_mining.py
index 2b1d0e9..ffd7b1f 100644
--- a/scripts/bug_mining.py
+++ b/scripts/bug_mining.py
@@ -117,8 +117,6 @@ def progress(msg):
     # global curtail
     curtail = int(sys.argv[4])
 
-panda_os_string = project.get('panda_os_string', 'linux-32-debian:3.2.0-4-686-pae')
-
 lavadir = dirname(dirname(abspath(sys.argv[0])))
 
 progress("Entering {}".format(project['output_dir']))