diff --git a/dockertarpusher/dockertarpusher.py b/dockertarpusher/dockertarpusher.py
index c3eff52..8ff529d 100644
--- a/dockertarpusher/dockertarpusher.py
+++ b/dockertarpusher/dockertarpusher.py
@@ -146,7 +146,7 @@ def read_in_chunks(self, file_object, hashed, chunk_size=2097152):
             yield data
 
     def setAuth(self, authObj):
-        self.atuh = authObj
+        self.auth = authObj
 
     def chunkedUpload(self, file, url):
         content_name = str(file)