diff --git a/makemodulerpm.pl b/makemodulerpm.pl
index 3cd6f57c3..9d3b6fe01 100755
--- a/makemodulerpm.pl
+++ b/makemodulerpm.pl
@@ -564,7 +564,7 @@ my $tar_release_file;
 if ($copy_tar) {
 	my $tar_release = $release;
 	$tar_release =~ s/^[0-9]+//;
-	$tar_release_file = "$mod-$ver$tar_release.tar.gz";
+	$tar_release_file = "$prefix$mod-$ver$tar_release.tar.gz";
 	system("cp $rpm_source_dir/$mod.tar.gz /tmp/$tar_release_file");
 	}