diff --git a/docs/changelog.md b/docs/changelog.md
index cbf21df3..ca7be0b0 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -29,6 +29,10 @@
   [#347](https://github.com/lovell/sharp/issues/347)
   [@oaleynik](https://github.com/oaleynik)
 
+* Ensure default crop gravity is center/centre.
+  [#351](https://github.com/lovell/sharp/pull/351)
+  [@joelmukuthu](https://github.com/joelmukuthu)
+
 * Small optimisation when reducing by an integral factor to favour shrink over affine.
 
 * Add support for gamma correction of images with an alpha channel.
diff --git a/src/pipeline.cc b/src/pipeline.cc
index 8efd1154..b92ccd8c 100644
--- a/src/pipeline.cc
+++ b/src/pipeline.cc
@@ -39,6 +39,7 @@ using Nan::Equals;
 
 using vips::VImage;
 using vips::VInterpolate;
+using vips::VOption;
 using vips::VError;
 
 using sharp::Composite;
@@ -222,11 +223,11 @@ class PipelineWorker : public AsyncWorker {
         inputImageType = DetermineImageType(baton->bufferIn, baton->bufferInLength);
         if (inputImageType != ImageType::UNKNOWN) {
           try {
-            image = VImage::new_from_buffer(
-              baton->bufferIn, baton->bufferInLength, nullptr, VImage::option()
-              ->set("access", baton->accessMethod)
-              ->set("density", baton->density.data())
-            );
+            VOption *option = VImage::option()->set("access", baton->accessMethod);
+            if (inputImageType == ImageType::MAGICK) {
+              option->set("density", baton->density.data());
+            }
+            image = VImage::new_from_buffer(baton->bufferIn, baton->bufferInLength, nullptr, option);
           } catch (...) {
             (baton->err).append("Input buffer has corrupt header");
             inputImageType = ImageType::UNKNOWN;
@@ -240,11 +241,11 @@ class PipelineWorker : public AsyncWorker {
       inputImageType = DetermineImageType(baton->fileIn.data());
       if (inputImageType != ImageType::UNKNOWN) {
         try {
-          image = VImage::new_from_file(
-            baton->fileIn.data(), VImage::option()
-            ->set("access", baton->accessMethod)
-            ->set("density", baton->density.data())
-          );
+          VOption *option = VImage::option()->set("access", baton->accessMethod);
+          if (inputImageType == ImageType::MAGICK) {
+            option->set("density", baton->density.data());
+          }
+          image = VImage::new_from_file(baton->fileIn.data(), option);
         } catch (...) {
           (baton->err).append("Input file has corrupt header");
           inputImageType = ImageType::UNKNOWN;
diff --git a/test/bench/package.json b/test/bench/package.json
index 00562e1d..b4c08fbd 100644
--- a/test/bench/package.json
+++ b/test/bench/package.json
@@ -5,7 +5,7 @@
   "author": "Lovell Fuller <npm@lovell.info>",
   "description": "Benchmark and performance tests for sharp",
   "scripts": {
-    "test": "node perf && node random && node parallel"
+    "test": "VIPS_WARNING=0 node perf && node random && node parallel"
   },
   "devDependencies": {
     "async": "^1.5.2",