diff --git a/gtfsdb/model/route.py b/gtfsdb/model/route.py
index 87a9f42..88918a5 100644
--- a/gtfsdb/model/route.py
+++ b/gtfsdb/model/route.py
@@ -12,7 +12,7 @@
 class RouteType(Base):
     __tablename__ = 'route_type'
 
-    route_type = Column(Integer, primary_key=True)
+    route_type = Column(Integer, primary_key=True, autoincrement=False)
     route_type_name = Column(String(255))
     route_type_desc = Column(String(255))