diff --git a/processing/post/postResults b/processing/post/postResults
index 4659f679d..ca7147da7 100755
--- a/processing/post/postResults
+++ b/processing/post/postResults
@@ -654,7 +654,7 @@ bg.start()
 
 # --- sanity checks
 
-if not file[0]:
+if file == []:
     parser.print_help()
     parser.error('no file specified...')