diff --git a/django/db/backends/oracle/base.py b/django/db/backends/oracle/base.py
index ab86076214..f9ad148b7e 100644
--- a/django/db/backends/oracle/base.py
+++ b/django/db/backends/oracle/base.py
@@ -106,6 +106,9 @@ class DatabaseOperations(BaseDatabaseOperations):
     def max_name_length(self):
         return 30
 
+    def prep_for_iexact_query(self, x):
+        return x
+
     def query_class(self, DefaultQueryClass):
         return query.query_class(DefaultQueryClass, Database)