diff --git a/app/assets/javascripts/discourse/components/utilities.js b/app/assets/javascripts/discourse/components/utilities.js
index 80ebbb736..06387851e 100644
--- a/app/assets/javascripts/discourse/components/utilities.js
+++ b/app/assets/javascripts/discourse/components/utilities.js
@@ -172,6 +172,8 @@ Discourse.Utilities = {
         return false;
       } else if (files.length > 0) {
         var upload = files[0];
+        // if the image was pasted, sets its name to a default one
+        if (upload instanceof Blob && !(upload instanceof File) && upload.type === "image/png") { upload.name = "blob.png"; }
         // check that the uploaded file is authorized
         if (!Discourse.Utilities.isAuthorizedUpload(upload)) {
           var extensions = Discourse.SiteSettings.authorized_extensions.replace(/\|/g, ", ");
diff --git a/lib/cooked_post_processor.rb b/lib/cooked_post_processor.rb
index 7b6cb5edd..0df554064 100644
--- a/lib/cooked_post_processor.rb
+++ b/lib/cooked_post_processor.rb
@@ -154,7 +154,7 @@ class CookedPostProcessor
 
   def get_filename(upload, src)
     return File.basename(src) unless upload
-    return upload.original_filename unless upload.original_filename == "blob"
+    return upload.original_filename unless upload.original_filename =~ /^blob(\.png)?$/i
     return I18n.t('upload.pasted_image_filename')
   end
 
diff --git a/spec/components/cooked_post_processor_spec.rb b/spec/components/cooked_post_processor_spec.rb
index 018f7af99..2fe886071 100644
--- a/spec/components/cooked_post_processor_spec.rb
+++ b/spec/components/cooked_post_processor_spec.rb
@@ -230,7 +230,7 @@ describe CookedPostProcessor do
     end
 
     it "returns a generic name for pasted images" do
-      upload = Fabricate.build(:upload, { original_filename: "blob" })
+      upload = Fabricate.build(:upload, { original_filename: "blob.png" })
       cpp.get_filename(upload, "http://domain.com/image.png").should == I18n.t('upload.pasted_image_filename')
     end
 
diff --git a/test/javascripts/components/utilities_test.js b/test/javascripts/components/utilities_test.js
index 35078481e..7b0e7426b 100644
--- a/test/javascripts/components/utilities_test.js
+++ b/test/javascripts/components/utilities_test.js
@@ -41,12 +41,28 @@ test("prevents files that are too big from being uploaded", function() {
   ok(bootbox.alert.calledWith(Em.String.i18n('post.errors.upload_too_large', { max_size_kb: 5 })));
 });
 
+var dummyBlob = function() {
+  window.BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder || window.MSBlobBuilder;
+  if (window.BlobBuilder) {
+    var bb = new window.BlobBuilder();
+    bb.append([1]);
+    return bb.getBlob("image/png");
+  } else {
+    return new Blob([1], { "type" : "image\/png" });
+  }
+};
+
 test("allows valid uploads to go through", function() {
-  var image = { name: "image.png", size: 10 * 1024 };
   Discourse.SiteSettings.max_upload_size_kb = 15;
   this.stub(bootbox, "alert");
 
+  // image
+  var image = { name: "image.png", size: 10 * 1024 };
   ok(validUpload([image]));
+  // pasted image
+  var pastedImage = dummyBlob();
+  ok(validUpload([pastedImage]));
+
   ok(!bootbox.alert.calledOnce);
 });
 
diff --git a/test/javascripts/jshint_all.js.erb b/test/javascripts/jshint_all.js.erb
index afdeb4bc8..d3361934e 100644
--- a/test/javascripts/jshint_all.js.erb
+++ b/test/javascripts/jshint_all.js.erb
@@ -125,7 +125,9 @@ var jsHintOpts = {
     "controllerFor",
     "containsInstance",
     "deepEqual",
-    "resolvingPromiseWith"],
+    "resolvingPromiseWith",
+    "Blob",
+    "File"],
   "node" : false,
   "browser" : true,
   "boss" : true,
@@ -183,4 +185,4 @@ var jsHintOpts = {
             /external_development\//,
             /external_production\//,
             /defer\//,
-            /locales\//]) %>
\ No newline at end of file
+            /locales\//]) %>