diff --git a/runtime/compiler/powershell.vim b/runtime/compiler/powershell.vim
index 4b1ce88..821fea4 100644
--- a/runtime/compiler/powershell.vim
+++ b/runtime/compiler/powershell.vim
@@ -4,6 +4,7 @@
 " Contributors: Enno Nagel
 " Last Change: 2024 Mar 29
 "		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
+"		2024 Apr 05 by The Vim Project (avoid leaving behind g:makeprg)
 
 if exists("current_compiler")
   finish
@@ -35,7 +36,7 @@
 
 " Use absolute path because powershell requires explicit relative paths
 " (./file.ps1 is okay, but # expands to file.ps1)
-let makeprg = g:ps1_makeprg_cmd .. ' %:p:S'
+let s:makeprg = g:ps1_makeprg_cmd .. ' %:p:S'
 
 " Parse file, line, char from callstacks:
 "     Write-Ouput : The term 'Write-Ouput' is not recognized as the name of a
@@ -48,7 +49,7 @@
 "         + CategoryInfo          : ObjectNotFound: (Write-Ouput:String) [], CommandNotFoundException
 "         + FullyQualifiedErrorId : CommandNotFoundException
 
-execute 'CompilerSet makeprg=' .. escape(makeprg, ' ')
+execute 'CompilerSet makeprg=' .. escape(s:makeprg, ' ')
 
 " Showing error in context with underlining.
 CompilerSet errorformat=%+G+%m