diff --git a/plugins/providers/docker/action/network.rb b/plugins/providers/docker/action/network.rb
index 0627a156f..ece840310 100644
--- a/plugins/providers/docker/action/network.rb
+++ b/plugins/providers/docker/action/network.rb
@@ -64,8 +64,7 @@ module VagrantPlugins
             elsif options[:type] == "dhcp"
               network_name = "vagrant_network"
             else
-              # TODO: Make this an error class
-              raise "Must specify a `subnet` or use `dhcp`"
+              raise Errors::NetworkInvalidOption, container: machine.name
             end
             container_id = machine.id
 
diff --git a/plugins/providers/docker/errors.rb b/plugins/providers/docker/errors.rb
index 36e1b9859..ffd085427 100644
--- a/plugins/providers/docker/errors.rb
+++ b/plugins/providers/docker/errors.rb
@@ -45,6 +45,10 @@ module VagrantPlugins
         error_key(:docker_provider_nfs_without_privileged)
       end
 
+      class NetworkInvalidOption < DockerError
+        error_key(:network_invalid_option)
+      end
+
       class PackageNotSupported < DockerError
         error_key(:package_not_supported)
       end
diff --git a/templates/locales/providers_docker.yml b/templates/locales/providers_docker.yml
index ba90473c6..d6f805407 100644
--- a/templates/locales/providers_docker.yml
+++ b/templates/locales/providers_docker.yml
@@ -197,6 +197,9 @@ en:
         is functional and properly configured.
 
         Host VM ID: %{id}
+      network_invalid_option: |-
+        Invalid option given for docker network for guest "%{container}". Must specify either
+        a `subnet` or use `type: "dhcp"`.
       package_not_supported: |-
         The "package" command is not supported with the Docker provider.
         If you'd like to commit or push your Docker container, please SSH