diff --git a/Alien/Package/Deb.pm b/Alien/Package/Deb.pm
index 373a2a1..02fdf7a 100644
--- a/Alien/Package/Deb.pm
+++ b/Alien/Package/Deb.pm
@@ -725,6 +725,8 @@ sub postinst {
 	# If there is no postinst, let's make one up..
 	$postinst="#!/bin/sh\n" unless length $postinst;
 	
+	return $postinst unless %$owninfo;
+	
 	my ($firstline, $rest)=split(/\n/, $postinst, 2);
 	if ($firstline !~ m/^#!\s*\/bin\/sh/) {
 		print STDERR "warning: unable to add ownership fixup code to postinst as the postinst is not a shell script!\n";
diff --git a/Alien/Package/Rpm.pm b/Alien/Package/Rpm.pm
index bc02716..144a434 100644
--- a/Alien/Package/Rpm.pm
+++ b/Alien/Package/Rpm.pm
@@ -202,12 +202,12 @@ sub unpack {
 		my ($mode, $owner, $group, $file) = split(/ /, $_, 4);
 		$mode = $mode & 07777; # remove filetype
 		my $uid = getpwnam($owner);
-		if (! defined $uid || $> != 0) {
+		if (! defined $uid || $uid != 0) {
 			$owninfo{$file}=$owner;
 			$uid=0;
 		}
 		my $gid = getgrnam($group);
-		if (! defined $gid || $> != 0) {
+		if (! defined $gid || $gid != 0) {
 			if (exists $owninfo{$file}) {
 				$owninfo{$file}.=":$group";
 			}