diff --git a/wagtail/search/query.py b/wagtail/search/query.py
index 9a4232e60..9a159d553 100644
--- a/wagtail/search/query.py
+++ b/wagtail/search/query.py
@@ -168,9 +168,9 @@ class Filter(SearchQueryShortcut):
     def get_equivalent(self):
         query = self.query
         if self.include is not None:
-            query &= self.include
+            query &= Boost(self.include, 0)
         if self.exclude is not None:
-            query &= ~self.exclude
+            query &= Boost(~self.exclude, 0)
         return query