diff --git a/litellm/proxy/db/routing_prisma_wrapper.py b/litellm/proxy/db/routing_prisma_wrapper.py
index ac747db6ee0..abcaedd9685 100644
--- a/litellm/proxy/db/routing_prisma_wrapper.py
+++ b/litellm/proxy/db/routing_prisma_wrapper.py
@@ -68,7 +68,7 @@ class WriterPinnedClient:
 
     __slots__ = ("db",)
 
-    def __init__(self, db: "PrismaWrapper | RoutingPrismaWrapper"):
+    def __init__(self, db: "PrismaWrapper | RoutingPrismaWrapper") -> None:
         self.db: Final = db.writer if isinstance(db, RoutingPrismaWrapper) else db