diff --git a/CHANGELOG.md b/CHANGELOG.md
index e0fcc99b5..032db62e2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,7 @@ BUG FIXES:
     status 126). [GH-934]
   - Action hook prepend/append will only prepend or append once.
   - Retry SSH on Errno::EACCES.
+  - Show an error if an invalid network type is used.
 
 ## 1.1.4 (March 25, 2013)
 
diff --git a/plugins/kernel_v2/config/vm.rb b/plugins/kernel_v2/config/vm.rb
index 58ba2006a..2273331a2 100644
--- a/plugins/kernel_v2/config/vm.rb
+++ b/plugins/kernel_v2/config/vm.rb
@@ -297,8 +297,14 @@ module VagrantPlugins
         # Validate networks
         has_fp_port_error = false
         fp_host_ports     = Set.new
+        valid_network_types = [:forwarded_port, :private_network, :public_network]
 
         networks.each do |type, options|
+          if !valid_network_types.include?(type)
+            errors << I18n.t("vagrant.config.vm.network_type_invalid",
+                            :type => type.to_s)
+          end
+
           if type == :forwarded_port
             if !has_fp_port_error && (!options[:guest] || !options[:host])
               errors << I18n.t("vagrant.config.vm.network_fp_requires_ports")
diff --git a/templates/locales/en.yml b/templates/locales/en.yml
index 5428e5a8d..4c384c0d3 100644
--- a/templates/locales/en.yml
+++ b/templates/locales/en.yml
@@ -494,6 +494,8 @@ en:
           Forwarded port '%{host}' (host port) is declared multiple times
         network_fp_requires_ports: |-
           Forwarded port definitions require a "host" and "guest" value
+        network_type_invalid: |-
+          Network type '%{type}' is invalid. Please use a valid network type.
         provisioner_not_found: |-
           The '%{name}' provisioner could not be found.
         shared_folder_guestpath_duplicate: |-