diff --git a/sensors/utils.py b/sensors/utils.py
index fee0198..ad08676 100644
--- a/sensors/utils.py
+++ b/sensors/utils.py
@@ -52,6 +52,7 @@
                 # no cmd returned
                 return "<NO NAME>"
     except IOError:
+        # upstream wait any string, no matter if we couldn't read proc
         return "no_such_process"