diff --git a/django/db/backends/util.py b/django/db/backends/util.py
index 3ec1b41485..d8f86fef4f 100644
--- a/django/db/backends/util.py
+++ b/django/db/backends/util.py
@@ -17,7 +17,7 @@ class CursorDebugWrapper(object):
             if not isinstance(params, (tuple, dict)):
                 params = tuple(params)
             self.db.queries.append({
-                'sql': sql % tuple(params),
+                'sql': sql % params,
                 'time': "%.3f" % (stop - start),
             })