diff --git a/django/core/meta/__init__.py b/django/core/meta/__init__.py
index f934f9dd6c..2e39f72e95 100644
--- a/django/core/meta/__init__.py
+++ b/django/core/meta/__init__.py
@@ -1360,9 +1360,10 @@ def function_get_sql_clause(opts, **kwargs):
 def function_get_in_bulk(opts, klass, *args, **kwargs):
     id_list = args and args[0] or kwargs['id_list']
     assert id_list != [], "get_in_bulk() cannot be passed an empty list."
-    kwargs['where'] = ["%s.id IN (%s)" % (opts.db_table, ",".join(map(str, id_list)))]
+    kwargs['where'] = ["%s.%s IN (%s)" % (opts.db_table, opts.pk.column, ",".join(['%s'] * len(id_list)))]
+    kwargs['params'] = id_list
     obj_list = function_get_list(opts, klass, **kwargs)
-    return dict([(o.id, o) for o in obj_list])
+    return dict([(getattr(o, opts.pk.column), o) for o in obj_list])
 
 def function_get_latest(opts, klass, does_not_exist_exception, **kwargs):
     kwargs['order_by'] = ('-' + opts.get_latest_by,)
diff --git a/tests/testapp/models/custom_pk.py b/tests/testapp/models/custom_pk.py
index 234b5c3308..5b0eb45462 100644
--- a/tests/testapp/models/custom_pk.py
+++ b/tests/testapp/models/custom_pk.py
@@ -53,6 +53,8 @@ EmployeeDoesNotExist: Employee does not exist for {'pk': 'foo'}
 >>> fran.save()
 >>> employees.get_list(last_name__exact='Jones')
 [Dan Jones, Fran Jones]
+>>> employees.get_in_bulk(['ABC123', 'XYZ456'])
+{'XYZ456': Fran Jones, 'ABC123': Dan Jones}
 
 >>> b = businesses.Business(name='Sears')
 >>> b.save()
@@ -62,4 +64,6 @@ True
 [Dan Jones, Fran Jones]
 >>> fran.get_business_list()
 [Sears]
+>>> businesses.get_in_bulk(['Sears'])
+{'Sears': Sears}
 """