diff --git a/django/db/models/fields/__init__.py b/django/db/models/fields/__init__.py
index 25f44a4d1c7..4763940c81e 100644
--- a/django/db/models/fields/__init__.py
+++ b/django/db/models/fields/__init__.py
@@ -1036,7 +1036,7 @@ class TimeField(Field):
             # Not usually a good idea to pass in a datetime here (it loses
             # information), but this can be a side-effect of interacting with a
             # database backend (e.g. Oracle), so we'll be accommodating.
-            return value.time
+            return value.time()
 
         # Attempt to parse a datetime:
         value = smart_str(value)
diff --git a/tests/regressiontests/datatypes/models.py b/tests/regressiontests/datatypes/models.py
index f6cbc9f0f64..0898b649b10 100644
--- a/tests/regressiontests/datatypes/models.py
+++ b/tests/regressiontests/datatypes/models.py
@@ -58,6 +58,15 @@ datetime.time(5, 30)
 >>> d3.consumed_at
 datetime.datetime(2007, 4, 20, 16, 19, 59)
 
+# Test for ticket #12059: TimeField wrongly handling datetime.datetime object.
+
+>>> d2.baked_time = datetime.datetime(year=2007, month=4, day=20, hour=16, minute=19, second=59)
+>>> d2.save()
+
+>>> d3 = Donut.objects.all()[0]
+>>> d3.baked_time
+datetime.time(16, 19, 59)
+
 # Year boundary tests (ticket #3689)
 
 >>> d = Donut(name='Date Test 2007', baked_date=datetime.datetime(year=2007, month=12, day=31), consumed_at=datetime.datetime(year=2007, month=12, day=31, hour=23, minute=59, second=59))