diff --git a/hwinfo/util/__init__.py b/hwinfo/util/__init__.py
index 3db0b7b..510b6bd 100644
--- a/hwinfo/util/__init__.py
+++ b/hwinfo/util/__init__.py
@@ -33,7 +33,10 @@ def __init__(self, data, regexs=None, seperator=None):
         self.set_seperator(seperator)
 
     def set_data(self, data):
-        self.DATA = data.strip()
+        if data:
+            self.DATA = data.strip()
+        else:
+            self.DATA = ""
 
     def set_regexs(self, regexs):
         if regexs: