diff --git a/caveclient/annotationengine.py b/caveclient/annotationengine.py
index 47ff0300..97276171 100644
--- a/caveclient/annotationengine.py
+++ b/caveclient/annotationengine.py
@@ -20,7 +20,6 @@ def AnnotationClient(
     api_version="latest",
     verify=True,
     max_retries=None,
-    retry_backoff=None,
     pool_maxsize=None,
     pool_block=None,
     over_client=None,
@@ -81,7 +80,6 @@ def AnnotationClient(
             aligned_volume_name,
             verify=verify,
             max_retries=max_retries,
-            retry_backoff=retry_backoff,
             pool_maxsize=pool_maxsize,
             pool_block=pool_block,
             over_client=over_client,
@@ -96,7 +94,6 @@ def AnnotationClient(
             dataset_name,
             verify=verify,
             max_retries=max_retries,
-            retry_backoff=retry_backoff,
             pool_maxsize=pool_maxsize,
             pool_block=pool_block,
             over_client=over_client,
@@ -114,7 +111,6 @@ def __init__(
         aligned_volume_name,
         verify=True,
         max_retries=None,
-        retry_backoff=None,
         pool_maxsize=None,
         pool_block=None,
         over_client=None,
@@ -128,7 +124,6 @@ def __init__(
             server_name,
             verify=verify,
             max_retries=max_retries,
-            retry_backoff=retry_backoff,
             pool_maxsize=pool_maxsize,
             pool_block=pool_block,
             over_client=over_client,