diff --git a/lib/search.py b/lib/search.py
index 58e205c..dc95aea 100644
--- a/lib/search.py
+++ b/lib/search.py
@@ -55,6 +55,9 @@ def match(paragraph, keyword, options=None, options_dict=None):
     For example: ~ssh~passphrase
     """
 
+    if keyword is None:
+        return True
+
     if '~' in keyword:
         keywords = keyword.split('~')
     else: