diff --git a/src/api/wix/WixToolset.Data/ErrorMessages.cs b/src/api/wix/WixToolset.Data/ErrorMessages.cs
index d604e94f9..c1d46375b 100644
--- a/src/api/wix/WixToolset.Data/ErrorMessages.cs
+++ b/src/api/wix/WixToolset.Data/ErrorMessages.cs
@@ -737,7 +737,7 @@ public static Message IllegalAttributeInMergeModule(SourceLineNumber sourceLineN
 
         public static Message IllegalAttributeValue(SourceLineNumber sourceLineNumbers, string elementName, string attributeName, string value, params string[] legalValues)
         {
-            return Message(sourceLineNumbers, Ids.IllegalAttributeValue, "The {0}/@{1} attribute's value, '{2}', is not one of the legal options: '{3}'.", elementName, attributeName, value, String.Join(",", legalValues));
+            return Message(sourceLineNumbers, Ids.IllegalAttributeValue, "The {0}/@{1} attribute's value, '{2}', is not one of the legal options: '{3}'.", elementName, attributeName, value, String.Join(", ", legalValues));
         }
 
         public static Message IllegalAttributeValueWhenNested(SourceLineNumber sourceLineNumbers, string elementName, string attributeName, string attrivuteValue, string parentElementName)
diff --git a/src/api/wix/WixToolset.Data/WarningMessages.cs b/src/api/wix/WixToolset.Data/WarningMessages.cs
index 8af36b57a..15068a903 100644
--- a/src/api/wix/WixToolset.Data/WarningMessages.cs
+++ b/src/api/wix/WixToolset.Data/WarningMessages.cs
@@ -229,7 +229,7 @@ public static Message DiscardedRollbackBoundary2(SourceLineNumber sourceLineNumb
 
         public static Message DiscouragedAllUsersValue(SourceLineNumber sourceLineNumbers, string path, string machineOrUser)
         {
-            return Message(sourceLineNumbers, Ids.DiscouragedAllUsersValue, "Bundles require a package to be either per-machine or per-user. The MSI '{0}' ALLUSERS Property is set to '2' which may change from per-user to per-machine at install time. The Bundle will assume the package is per-{1} and will not work correctly if that changes. If possible, remove the Property with Id='ALLUSERS' and use Package/@InstallScope attribute instead.", path, machineOrUser);
+            return Message(sourceLineNumbers, Ids.DiscouragedAllUsersValue, "Bundles require a package to be either per-machine or per-user. The MSI '{0}' ALLUSERS Property is set to '2' which may change from per-user to per-machine at install time. The Bundle will assume the package is per-{1} and will not work correctly if that changes. If possible, use the Package/@Scope attribute values 'perUser' or 'perMachine' instead.", path, machineOrUser);
         }
 
         public static Message DetectConditionRecommended(SourceLineNumber sourceLineNumbers, string elementName)
diff --git a/src/wix/WixToolset.Core/Compiler_Package.cs b/src/wix/WixToolset.Core/Compiler_Package.cs
index 74b3aae26..853c6ed20 100644
--- a/src/wix/WixToolset.Core/Compiler_Package.cs
+++ b/src/wix/WixToolset.Core/Compiler_Package.cs
@@ -99,7 +99,7 @@ private void ParsePackageElement(XElement node)
                                 isPerUserOrMachine = true;
                                 break;
                             default:
-                                this.Core.Write(ErrorMessages.IllegalAttributeValue(sourceLineNumbers, node.Name.LocalName, attrib.Name.LocalName, installScope, "perMachine", "perUser"));
+                                this.Core.Write(ErrorMessages.IllegalAttributeValue(sourceLineNumbers, node.Name.LocalName, attrib.Name.LocalName, installScope, "perMachine", "perUser", "perUserOrMachine"));
                                 break;
                             }
                         break;