diff --git a/CHANGES.rst b/CHANGES.rst
index b1cd29909..2283da11f 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -47,12 +47,6 @@ Changelog (Pillow)
 - Depends: Update freetype to 2.9.1, libjpeg to 9c, libwebp to 1.0.0 #3121, #3136, #3108
   [radarhere]
 
-- Build macOS wheels with Xcode 6.4, supporting older macOS versions #3068
-  [wiredfool]
-
-- Fix _i2f compilation on some GCC versions #3067
-  [homm]
-
 - Changed encoderinfo to have priority over info when saving GIF images #3086
   [radarhere]
 
@@ -71,6 +65,15 @@ Changelog (Pillow)
 - Fix dereferencing type-punned pointer will break strict-aliasing #3069
   [jdufresne]
 
+5.1.1 (2018-04-12)
+------------------
+
+- Fix _i2f compilation on some GCC versions #3067
+  [homm]
+
+- Build macOS wheels with Xcode 6.4, supporting older macOS versions #3068
+  [wiredfool]
+
 5.1.0 (2018-04-02)
 ------------------
 
diff --git a/docs/releasenotes/5.1.1.rst b/docs/releasenotes/5.1.1.rst
new file mode 100644
index 000000000..0a5eb1fdb
--- /dev/null
+++ b/docs/releasenotes/5.1.1.rst
@@ -0,0 +1,18 @@
+5.1.1
+-----
+
+Build macOS wheels with Xcode 6.4, supporting older macOS versions
+==================================================================
+
+The macOS wheels for Pillow 5.1.0 were built with Xcode 9.2, meaning 10.12
+Sierra was the lowest supported version.
+
+Prior to Pillow 5.1.0, Xcode 8 was used, supporting El Capitan 10.11.
+
+Instead, Pillow 5.1.1 is built with the oldest available Xcode 6.4 to support
+at least 10.10 Yosemite.
+
+Fix _i2f compilation with some GCC versions
+===========================================
+
+For example, this allows compilation with GCC 4.8 on NetBSD.
diff --git a/docs/releasenotes/index.rst b/docs/releasenotes/index.rst
index 16e5c1d85..ea5d38fd6 100644
--- a/docs/releasenotes/index.rst
+++ b/docs/releasenotes/index.rst
@@ -7,6 +7,7 @@ Release Notes
   :maxdepth: 2
 
   5.2.0
+  5.1.1
   5.1.0
   5.0.0
   4.3.0