diff --git a/contrib/packaging/wix/guids.wxi b/contrib/packaging/wix/guids.wxi
--- a/contrib/packaging/wix/guids.wxi
+++ b/contrib/packaging/wix/guids.wxi
@@ -42,8 +42,8 @@
 
   <?define ReadMe.guid = {56A8E372-991D-4DCA-B91D-93D775974CF5} ?>
   <?define COPYING.guid = {B7801DBA-1C49-4BF4-91AD-33C65F5C7895} ?>
-  <?define mercurial.rc.guid = {1D5FAEEE-7E6E-43B1-9F7F-802714316B15} ?>
-  <?define mergetools.rc.guid = {E8A1DC29-FF40-4B5F-BD12-80B9F7BF0CCD} ?>
+  <?define mercurial.rc.guid = {52BBF223-58F6-47F5-9353-8FDEA88D9B8D} ?>
+  <?define mergetools.rc.guid = {5AF0430B-2B76-4BC6-91EE-E771B74A0214} ?>
   <?define ProgramMenuDir.guid = {D5A63320-1238-489B-B68B-CF053E9577CA} ?>
 
 </Include>
diff --git a/contrib/packaging/wix/mercurial.wxs b/contrib/packaging/wix/mercurial.wxs
--- a/contrib/packaging/wix/mercurial.wxs
+++ b/contrib/packaging/wix/mercurial.wxs
@@ -75,11 +75,11 @@
 
           <Directory Id='HGRCD' Name='hgrc.d'>
             <Component Id='mercurial.rc' Guid='$(var.mercurial.rc.guid)' Win64='$(var.IsX64)'>
-              <File Id='mercurial.rc' Name='Mercurial.rc' Source='contrib\win32\mercurial.ini'
+              <File Id='mercurial.rc' Name='mercurial.rc' Source='contrib\win32\mercurial.ini'
                     ReadOnly='yes' KeyPath='yes'/>
             </Component>
             <Component Id='mergetools.rc' Guid='$(var.mergetools.rc.guid)' Win64='$(var.IsX64)'>
-              <File Id='mergetools.rc' Name='MergeTools.rc' Source='mercurial\default.d\mergetools.rc'
+              <File Id='mergetools.rc' Name='mergetools.rc' Source='mercurial\default.d\mergetools.rc'
                     ReadOnly='yes' KeyPath='yes'/>
             </Component>
           </Directory>