diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py
index c3da2d4049..fdfca33b72 100644
--- a/django/db/models/fields/__init__.py
+++ b/django/db/models/fields/__init__.py
@@ -1571,8 +1571,8 @@ class DecimalField(Field):
 class DurationField(Field):
     """Stores timedelta objects.
 
-    Uses interval on postgres, INVERAL DAY TO SECOND on Oracle, and bigint of
-    microseconds on other databases.
+    Uses interval on PostgreSQL, INTERVAL DAY TO SECOND on Oracle, and bigint
+    of microseconds on other databases.
     """
     empty_strings_allowed = False
     default_error_messages = {