diff --git a/README.md b/README.md
index 038073f93..1540a84f8 100755
--- a/README.md
+++ b/README.md
@@ -84,9 +84,6 @@ The _gettext_ dependency of _libvips_ [can lead](https://github.com/lovell/sharp
 
 	brew link gettext --force
 
-### Openslide tips
-If you want to enable OpenSlide support, you need to initially install the openslide libraries and then recompile vips, so that openslide support is enabled.
-
 ### Heroku
 
 [Alessandro Tagliapietra](https://github.com/alex88) maintains an [Heroku buildpack for libvips](https://github.com/alex88/heroku-buildpack-vips) and its dependencies.
@@ -103,8 +100,6 @@ If you want to enable OpenSlide support, you need to initially install the opens
 * [gulp-sharp](https://www.npmjs.com/package/gulp-sharp)
 * [grunt-sharp](https://www.npmjs.com/package/grunt-sharp)
 
-
-
 ## Usage examples
 
 ```javascript
diff --git a/preinstall.sh b/preinstall.sh
index 8109abdf7..9745299d2 100755
--- a/preinstall.sh
+++ b/preinstall.sh
@@ -248,7 +248,6 @@ case $(uname -s) in
         brew install homebrew/science/vips --with-webp --with-graphicsmagick
       fi
     elif type "port" > /dev/null; then
-      # XXX
       echo "Installing libvips via MacPorts"
       port install vips
     else
@@ -265,7 +264,7 @@ case $(uname -s) in
           # Debian 8, Ubuntu 15
           if [ $enable_openslide -eq 1 ]; then
             echo "Installing libvips via apt-get"
-            apt-get install -y libvips-dev
+            apt-get install -y libvips-dev libgsf-1-dev
           else
             echo "Recompiling vips with openslide support"
             install_libvips_from_source
diff --git a/src/resize.cc b/src/resize.cc
index 1b7b86080..dfc7db05e 100755
--- a/src/resize.cc
+++ b/src/resize.cc
@@ -1029,7 +1029,7 @@ NAN_METHOD(resize) {
   baton->withoutAdaptiveFiltering = options->Get(NanNew<String>("withoutAdaptiveFiltering"))->BooleanValue();
   baton->withoutChromaSubsampling = options->Get(NanNew<String>("withoutChromaSubsampling"))->BooleanValue();
   baton->withMetadata = options->Get(NanNew<String>("withMetadata"))->BooleanValue();
-    // Output filename or __format for Buffer
+  // Output filename or __format for Buffer
   baton->output = *String::Utf8Value(options->Get(NanNew<String>("output"))->ToString());
   baton->tileSize = options->Get(NanNew<String>("tileSize"))->Int32Value();
   baton->tileOverlap = options->Get(NanNew<String>("tileOverlap"))->Int32Value();