diff --git a/src/zarr/storage/common.py b/src/zarr/storage/common.py
index 0485a33576..1e33967414 100644
--- a/src/zarr/storage/common.py
+++ b/src/zarr/storage/common.py
@@ -160,10 +160,7 @@ async def delete_dir(self) -> None:
         """
         Delete all keys with the given prefix from the store.
         """
-        path = self.path
-        if not path.endswith("/"):
-            path += "/"
-        await self.store.delete_dir(path)
+        await self.store.delete_dir(self.path)
 
     async def set_if_not_exists(self, default: Buffer) -> None:
         """