diff --git a/django/contrib/postgres/search.py b/django/contrib/postgres/search.py
index 2786251548..dceda6c8da 100644
--- a/django/contrib/postgres/search.py
+++ b/django/contrib/postgres/search.py
@@ -19,7 +19,7 @@ class SearchVectorExact(Lookup):
         lhs, lhs_params = self.process_lhs(qn, connection)
         rhs, rhs_params = self.process_rhs(qn, connection)
         params = lhs_params + rhs_params
-        return '%s @@ %s = true' % (lhs, rhs), params
+        return '%s @@ %s' % (lhs, rhs), params
 
 
 class SearchVectorField(Field):