diff --git a/src/bin/pg_rewind/t/003_extrafiles.pl b/src/bin/pg_rewind/t/003_extrafiles.pl
index 7e4c2771ce..bab4b73d31 100644
--- a/src/bin/pg_rewind/t/003_extrafiles.pl
+++ b/src/bin/pg_rewind/t/003_extrafiles.pl
@@ -82,7 +82,7 @@ sub run_test
 	# File::Find converts backslashes to slashes in the newer Perl
 	# versions. To support all Perl versions, do the same conversion
 	# for Windows before comparing the paths.
-	if ($PostgreSQL::Test::Utils::windows_os)
+	if ($windows_os)
 	{
 		for my $filename (@paths)
 		{