diff --git a/docs/api-operation.md b/docs/api-operation.md
index 3e91be97..07b98837 100644
--- a/docs/api-operation.md
+++ b/docs/api-operation.md
@@ -8,8 +8,8 @@ or auto-orient based on the EXIF `Orientation` tag.
 If an angle is provided, it is converted to a valid positive degree rotation.
 For example, `-450` will produce a 270deg rotation.
 
-If an angle that is not a multiple of 90 is provided, the color of the
-background color can be provided with the `background` option.
+When rotating by an angle other than a multiple of 90,
+the background colour can be provided with the `background` option.
 
 If no angle is provided, it is determined from the EXIF data.
 Mirroring is supported and may infer the use of a flip operation.
@@ -21,7 +21,7 @@ for example `rotate(x).extract(y)` will produce a different result to `extract(y
 
 ### Parameters
 
--   `angle` **[Number][1]** angle of rotation, must be a multiple of 90. (optional, default `auto`)
+-   `angle` **[Number][1]** angle of rotation. (optional, default `auto`)
 -   `options` **[Object][2]?** if present, is an Object with optional attributes.
     -   `options.background` **([String][3] \| [Object][2])** parsed by the [color][4] module to extract values for red, green, blue and alpha. (optional, default `"#000000"`)
 
diff --git a/docs/changelog.md b/docs/changelog.md
index 441d6553..bac3a8aa 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -15,6 +15,10 @@ Requires libvips v8.7.0.
 * Add experimental prebuilt binaries for musl-based Linux.
   [#1379](https://github.com/lovell/sharp/issues/1379)
 
+* Add support for arbitrary rotation angle via vips_rotate.
+  [#1385](https://github.com/lovell/sharp/pull/1385)
+  [@freezy](https://github.com/freezy)
+
 ### v0.20 - "*prebuild*"
 
 Requires libvips v8.6.1.
diff --git a/docs/index.md b/docs/index.md
index 9235cef5..19677b38 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -118,6 +118,7 @@ the help and code contributions of the following people:
 * [Alun Davies](https://github.com/alundavies)
 * [Aidan Hoolachan](https://github.com/ajhool)
 * [Axel Eirola](https://github.com/aeirola)
+* [Freezy](https://github.com/freezy)
 
 Thank you!
 
diff --git a/lib/operation.js b/lib/operation.js
index 8c0b54b7..71186158 100644
--- a/lib/operation.js
+++ b/lib/operation.js
@@ -10,8 +10,8 @@ const is = require('./is');
  * If an angle is provided, it is converted to a valid positive degree rotation.
  * For example, `-450` will produce a 270deg rotation.
  *
- * If an angle that is not a multiple of 90 is provided, the color of the
- * background color can be provided with the `background` option.
+ * When rotating by an angle other than a multiple of 90,
+ * the background colour can be provided with the `background` option.
  *
  * If no angle is provided, it is determined from the EXIF data.
  * Mirroring is supported and may infer the use of a flip operation.
@@ -32,7 +32,7 @@ const is = require('./is');
  *   });
  * readableStream.pipe(pipeline);
  *
- * @param {Number} [angle=auto] angle of rotation, must be a multiple of 90.
+ * @param {Number} [angle=auto] angle of rotation.
  * @param {Object} [options] - if present, is an Object with optional attributes.
  * @param {String|Object} [options.background="#000000"] parsed by the [color](https://www.npmjs.org/package/color) module to extract values for red, green, blue and alpha.
  * @returns {Sharp}
@@ -55,7 +55,7 @@ function rotate (angle, options) {
       ];
     }
   } else {
-    throw new Error('Unsupported angle: angle must be a number.');
+    throw new Error('Unsupported angle: must be a number.');
   }
   return this;
 }
diff --git a/package.json b/package.json
index 520c0cbc..fdd0f055 100644
--- a/package.json
+++ b/package.json
@@ -54,7 +54,8 @@
     "Sylvain Dumont <sylvain.dumont35@gmail.com>",
     "Alun Davies <alun.owain.davies@googlemail.com>",
     "Aidan Hoolachan <ajhoolachan21@gmail.com>",
-    "Axel Eirola <axel.eirola@iki.fi>"
+    "Axel Eirola <axel.eirola@iki.fi>",
+    "Freezy <freezy@xbmc.org>"
   ],
   "scripts": {
     "install": "(node install/libvips && node install/dll-copy && prebuild-install) || (node-gyp rebuild && node install/dll-copy)",