diff --git a/dataset/table.py b/dataset/table.py
index bf829df..88c5c8a 100644
--- a/dataset/table.py
+++ b/dataset/table.py
@@ -29,8 +29,14 @@ class Table(object):
         self.name = normalize_table_name(table_name)
         self._table = None
         self._indexes = []
-        self._primary_id = primary_id
-        self._primary_type = primary_type
+        if primary_id is not None:
+            self._primary_id = primary_id
+        else:
+            self._primary_id = self.PRIMARY_DEFAULT
+        if primary_type is not None:
+            self._primary_type = primary_type
+        else:
+            self._primary_type = Types.integer
         self._auto_create = auto_create
 
     @property
@@ -235,8 +241,8 @@ class Table(object):
                 if self._primary_id is not False:
                     # This can go wrong on DBMS like MySQL and SQLite where
                     # tables cannot have no columns.
-                    primary_id = self._primary_id or self.PRIMARY_DEFAULT
-                    primary_type = self._primary_type or Types.integer
+                    primary_id = self._primary_id
+                    primary_type = self._primary_type
                     increment = primary_type in [Types.integer, Types.bigint]
                     column = Column(primary_id, primary_type,
                                     primary_key=True,
diff --git a/test/test_dataset.py b/test/test_dataset.py
index a6c8f89..e60caf6 100644
--- a/test/test_dataset.py
+++ b/test/test_dataset.py
@@ -236,6 +236,12 @@ class TableTestCase(unittest.TestCase):
             )
         assert len(self.tbl) == len(TEST_DATA) + 1, len(self.tbl)
 
+    def test_upsert_id(self):
+        table = self.db['banana_with_id']
+        data = dict(id=10, title='I am a banana!')
+        table.upsert(data, ['id'])
+        assert len(table) == 1, len(table)
+
     def test_update_while_iter(self):
         for row in self.tbl:
             row['foo'] = 'bar'