diff --git a/gluon/packages/dal b/gluon/packages/dal
index 63dcebbf..b07edb59 160000
--- a/gluon/packages/dal
+++ b/gluon/packages/dal
@@ -1 +1 @@
-Subproject commit 63dcebbf2d980dbad376342874c77bd821880354
+Subproject commit b07edb5914393cb871a5f9106018849f0889029c
diff --git a/gluon/validators.py b/gluon/validators.py
index 54e03cbd..af6496f2 100644
--- a/gluon/validators.py
+++ b/gluon/validators.py
@@ -645,11 +645,10 @@ class IS_IN_DB(Validator):
                 if not [v for v in values if v not in self.theset]:
                     return (values, None)
             else:
-                from pydal.adapters import GoogleDatastoreAdapter
-
                 def count(values, s=self.dbset, f=field):
                     return s(f.belongs(map(int, values))).count()
-                if GoogleDatastoreAdapter is not None and isinstance(self.dbset.db._adapter, GoogleDatastoreAdapter):
+
+                if self.dbset.db._adapter.dbengine == "google:datastore":
                     range_ids = range(0, len(values), 30)
                     total = sum(count(values[i:i + 30]) for i in range_ids)
                     if total == len(values):