diff --git a/tabellio/searchform/cmpfunctions.py b/tabellio/searchform/cmpfunctions.py
index 9a769fe..2f3c77a 100644
--- a/tabellio/searchform/cmpfunctions.py
+++ b/tabellio/searchform/cmpfunctions.py
@@ -8,8 +8,8 @@ def get_no_as_int(i):
     if i:
         if ' ' in i:
             try:
-                return int(re.match('\d+', i).group())
-            except ValueError:
+                return int(re.match('\d+', i.strip()).group())
+            except (ValueError, AttributeError):
                 return 99999
         try:
             return int(i.split('-')[0])