diff --git a/pandora-box.py b/pandora-box.py
index 6cf1483..444400c 100755
--- a/pandora-box.py
+++ b/pandora-box.py
@@ -518,7 +518,7 @@ def scan():
     """Scan devce with pypandora"""
     global pandora, qfolder
     global work_queue, exit_flag, threads, scanned
-    global mount_point, infected_files, file_count, used
+    global mount_point, infected_files, file_count, f_used
 
     # get device size
     try: