diff --git a/dh_installzope b/dh_installzope
index 42cfaed..6592330 100755
--- a/dh_installzope
+++ b/dh_installzope
@@ -117,7 +117,7 @@ sub write_dzfile {
     my ($fn, %fields) = @_;
     my ($out) = "";
     open (DZ, ">$fn") || error("cannot write $fn: $!\n");
-    foreach (keys %fields) {
+    foreach (sort keys %fields) {
         $out = "$_: $fields{$_}\n" . $out;
     }
     print DZ $out;
diff --git a/dh_installzopeinstance b/dh_installzopeinstance
index 1021fe9..54b742a 100755
--- a/dh_installzopeinstance
+++ b/dh_installzopeinstance
@@ -94,7 +94,7 @@ sub write_dzfile {
 	my ($fn, %fields) = @_;
 	my ($out) = "";
 	open (DZ, ">$fn") || error("cannot write $fn: $!\n");
-	foreach (keys %fields) {
+	foreach (sort keys %fields) {
 		$out = "$_: $fields{$_}\n" . $out;
 	}
 	print DZ $out;