diff --git a/docs/releasenotes/3.4.0.rst b/docs/releasenotes/3.4.0.rst
index a6512fc12..65b52e958 100644
--- a/docs/releasenotes/3.4.0.rst
+++ b/docs/releasenotes/3.4.0.rst
@@ -20,7 +20,7 @@ Deprecation Warning when Saving JPEGs
 JPEG images cannot contain an alpha channel. Pillow prior to 3.4.0
 silently drops the alpha channel. With this release Pillow will now
 issue a ``DeprecationWarning`` when attempting to save a ``RGBA`` mode
-image as a JPEG. This will become an error in Pillow 3.7.
+image as a JPEG. This will become an error in Pillow 4.2.
 
 New DDS Decoders
 ================