diff --git a/bin/sync-slave b/bin/sync-slave
index bb27d11..ca972ab 100755
--- a/bin/sync-slave
+++ b/bin/sync-slave
@@ -7,6 +7,8 @@ use File::Temp qw/tempfile/;
 
 my $force = shift; # a "force" flag, if the update is big
 
+sleep 30; # So the master can populate new zones first
+
 my $ddns = Martnet::DDNS->new();
 
 my @vh = $ddns->get();