diff --git a/bin/osv/expression.py b/bin/osv/expression.py
index 5a43a17ac9b..5924b62bf20 100644
--- a/bin/osv/expression.py
+++ b/bin/osv/expression.py
@@ -149,21 +149,21 @@ class expression(object):
                 
                 continue
 
-            if field._properties:
+            if field._properties and ((not field.store) or field._fnct_search):
+
                 # this is a function field
-                if not field.store:
-                    if not field._fnct_search:
-                        # the function field doesn't provide a search function and doesn't store
-                        # values in the database, so we must ignore it : we generate a dummy leaf
-                        self.__exp[i] = self.__DUMMY_LEAF
-                    else:
-                        subexp = field.search(cr, uid, table, left, [self.__exp[i]], context=context)
-                        # we assume that the expression is valid
-                        # we create a dummy leaf for forcing the parsing of the resulting expression
-                        self.__exp[i] = '&'
-                        self.__exp.insert(i + 1, self.__DUMMY_LEAF)
-                        for j, se in enumerate(subexp):
-                            self.__exp.insert(i + 2 + j, se)
+                if not field._fnct_search:
+                    # the function field doesn't provide a search function and doesn't store
+                    # values in the database, so we must ignore it : we generate a dummy leaf
+                    self.__exp[i] = self.__DUMMY_LEAF
+                else:
+                    subexp = field.search(cr, uid, table, left, [self.__exp[i]], context=context)
+                    # we assume that the expression is valid
+                    # we create a dummy leaf for forcing the parsing of the resulting expression
+                    self.__exp[i] = '&'
+                    self.__exp.insert(i + 1, self.__DUMMY_LEAF)
+                    for j, se in enumerate(subexp):
+                        self.__exp.insert(i + 2 + j, se)
 
                 # else, the value of the field is store in the database, so we search on it