diff --git a/lib/vagrant/action/builtin/box_add.rb b/lib/vagrant/action/builtin/box_add.rb
index 60ac6d597..dcd3a8ce4 100644
--- a/lib/vagrant/action/builtin/box_add.rb
+++ b/lib/vagrant/action/builtin/box_add.rb
@@ -348,9 +348,15 @@ module Vagrant
             end
 
             if opts[:checksum] && opts[:checksum_type]
-              env[:ui].detail(I18n.t("vagrant.actions.box.add.checksumming"))
-              validate_checksum(
-                opts[:checksum_type], opts[:checksum], box_url)
+              if opts[:checksum].to_s.strip.empty?
+                @logger.warn("Given checksum is empty, cannot validate checksum for box")
+              elsif opts[:checksum_type].to_s.strip.empty?
+                @logger.warn("Given checksum type is empty, cannot validate checksum for box")
+              else
+                env[:ui].detail(I18n.t("vagrant.actions.box.add.checksumming"))
+                validate_checksum(
+                  opts[:checksum_type], opts[:checksum], box_url)
+              end
             end
 
             # Add the box!
diff --git a/lib/vagrant/util/file_checksum.rb b/lib/vagrant/util/file_checksum.rb
index 2b195a7b0..060250a8c 100644
--- a/lib/vagrant/util/file_checksum.rb
+++ b/lib/vagrant/util/file_checksum.rb
@@ -66,7 +66,8 @@ class FileChecksum
     digest = CHECKSUM_MAP[type.to_s.to_sym]
     if digest.nil?
       raise Vagrant::Errors::BoxChecksumInvalidType,
-        type: type.to_s
+        type: type.to_s,
+        types: CHECKSUM_MAP.keys.join(', ')
     end
     digest
   end
diff --git a/templates/locales/en.yml b/templates/locales/en.yml
index 0339cf220..4d045e32b 100644
--- a/templates/locales/en.yml
+++ b/templates/locales/en.yml
@@ -578,7 +578,7 @@ en:
         The specified checksum type is not supported by Vagrant: %{type}.
         Vagrant supports the following checksum types:
 
-        md5, sha1, sha256
+        %{types}
       box_checksum_mismatch: |-
         The checksum of the downloaded box did not match the expected
         value. Please verify that you have the proper URL setup and that
diff --git a/test/unit/vagrant/action/builtin/box_add_test.rb b/test/unit/vagrant/action/builtin/box_add_test.rb
index 8f648bcf1..91bbc27a2 100644
--- a/test/unit/vagrant/action/builtin/box_add_test.rb
+++ b/test/unit/vagrant/action/builtin/box_add_test.rb
@@ -209,6 +209,29 @@ describe Vagrant::Action::Builtin::BoxAdd, :skip_windows, :bsdtar do
         to raise_error(Vagrant::Errors::BoxChecksumMismatch)
     end
 
+    it "ignores checksums if empty string" do
+      box_path = iso_env.box2_file(:virtualbox)
+      with_web_server(box_path) do |port|
+        env[:box_name] = "foo"
+        env[:box_url] = "http://127.0.0.1:#{port}/#{box_path.basename}"
+        env[:box_checksum] = ""
+        env[:box_checksum_type] = ""
+
+
+        expect(box_collection).to receive(:add).with(any_args) { |path, name, version, **opts|
+          expect(checksum(path)).to eq(checksum(box_path))
+          expect(name).to eq("foo")
+          expect(version).to eq("0")
+          expect(opts[:metadata_url]).to be_nil
+          true
+        }.and_return(box)
+
+        expect(app).to receive(:call).with(env)
+
+        subject.call(env)
+      end
+    end
+
     it "does not raise an error if the checksum has different case" do
       box_path = iso_env.box2_file(:virtualbox)