diff --git a/src/Umbraco.Web.UI/umbraco/config/lang/en.xml b/src/Umbraco.Web.UI/umbraco/config/lang/en.xml
index 80c18a597d..f7a5ac5ef4 100644
--- a/src/Umbraco.Web.UI/umbraco/config/lang/en.xml
+++ b/src/Umbraco.Web.UI/umbraco/config/lang/en.xml
@@ -480,6 +480,7 @@
         <key alias="currentListViewDesc" version="7.2">The active list view data type</key>
         <key alias="createListView" version="7.2">Create custom list view</key>
         <key alias="removeListView" version="7.2">Remove custom list view</key>
+        <key alias="aliasAlreadyExists">A content type, media type or member type with this alias already exists</key>
     </area>
     <area alias="renamecontainer">
         <key alias="renamed">Renamed</key>
diff --git a/src/Umbraco.Web.UI/umbraco/config/lang/en_us.xml b/src/Umbraco.Web.UI/umbraco/config/lang/en_us.xml
index b018a562fc..655c619095 100644
--- a/src/Umbraco.Web.UI/umbraco/config/lang/en_us.xml
+++ b/src/Umbraco.Web.UI/umbraco/config/lang/en_us.xml
@@ -480,6 +480,7 @@
         <key alias="currentListViewDesc" version="7.2">The active list view data type</key>
         <key alias="createListView" version="7.2">Create custom list view</key>
         <key alias="removeListView" version="7.2">Remove custom list view</key>
+        <key alias="aliasAlreadyExists">A content type, media type or member type with this alias already exists</key>
     </area>
     <area alias="renamecontainer">
         <key alias="renamed">Renamed</key>
diff --git a/src/Umbraco.Web/Editors/ContentTypeControllerBase.cs b/src/Umbraco.Web/Editors/ContentTypeControllerBase.cs
index 20dc316c49..1d728c63a5 100644
--- a/src/Umbraco.Web/Editors/ContentTypeControllerBase.cs
+++ b/src/Umbraco.Web/Editors/ContentTypeControllerBase.cs
@@ -227,9 +227,9 @@ namespace Umbraco.Web.Editors
             // works since that is based on aliases.
             var allAliases = Services.ContentTypeService.GetAllContentTypeAliases();
             var exists = allAliases.InvariantContains(contentTypeSave.Alias);
-            if ((exists) && (ctId == 0 || ct.Alias != contentTypeSave.Alias))
+            if (exists && (ctId == 0 || ct.Alias.InvariantEquals(contentTypeSave.Alias) == false))
             {
-                ModelState.AddModelError("Alias", "A content type, media type or member type with this alias already exists");
+                ModelState.AddModelError("Alias", Services.TextService.Localize("editcontenttype/aliasAlreadyExists"));
             }
 
             //now let the external validators execute