diff --git a/postinstall.pl b/postinstall.pl
new file mode 100755
index 0000000..c3a2bfa
--- /dev/null
+++ b/postinstall.pl
@@ -0,0 +1,24 @@
+use strict;
+use warnings;
+our ($module_name, %gconfig);
+
+do 'virtualmin-htpasswd-lib.pl';
+
+sub module_install
+{
+# Enable virtualmin-htpasswd module once
+my @p = split(/\s+/, $virtual_server::config{'plugins'});
+my @ppe = split(/\s+/, $virtual_server::config{'plugins_postinstall_enabled'});
+if (&indexof('virtualmin-nginx', @virtual_server::plugins) > -1 &&
+    &indexof($module_name, @p) == -1 &&
+    &indexof($module_name, @ppe) == -1) {
+	&virtual_server::lock_file($virtual_server::module_config_file);
+	push(@p, $module_name);
+	push(@ppe, $module_name);
+	$virtual_server::config{'plugins'} = join(" ", @p);
+	$virtual_server::config{'plugins_postinstall_enabled'} = join(" ", @ppe);
+	&virtual_server::save_module_config(\%virtual_server::config, 'virtual-server');
+	&virtual_server::unlock_file($virtual_server::module_config_file);
+	}
+}
+