diff --git a/group_vars/matrix_servers b/group_vars/matrix_servers
index 596fba130..02e89176e 100755
--- a/group_vars/matrix_servers
+++ b/group_vars/matrix_servers
@@ -695,6 +695,10 @@ matrix_hookshot_provisioning_enabled: "{{ matrix_hookshot_provisioning_secret an
 matrix_hookshot_proxy_metrics: "{{ matrix_nginx_proxy_proxy_synapse_metrics }}"
 matrix_hookshot_proxy_metrics_basic_auth_enabled: "{{ matrix_nginx_proxy_proxy_synapse_metrics_basic_auth_enabled }}"
 
+matrix_hookshot_generic_urlprefix_port_enabled: "{{ matrix_nginx_proxy_container_https_host_bind_port == 443 if matrix_nginx_proxy_https_enabled else matrix_nginx_proxy_container_https_host_bind_port == 80 }}"
+matrix_hookshot_generic_urlprefix_port: ":{{ matrix_nginx_proxy_container_https_host_bind_port if matrix_nginx_proxy_https_enabled else matrix_nginx_proxy_container_http_host_bind_port }}"
+matrix_hookshot_generic_urlprefix: "http{{ 's' if matrix_nginx_proxy_https_enabled }}://{{ matrix_server_fqn_matrix }}{{ matrix_hookshot_generic_urlprefix_port if matrix_hookshot_generic_urlprefix_port_enabled }}{{ matrix_hookshot_generic_endpoint }}"
+
 ######################################################################
 #
 # /matrix-bridge-hookshot
diff --git a/roles/matrix-bridge-hookshot/defaults/main.yml b/roles/matrix-bridge-hookshot/defaults/main.yml
index 2db8ba774..f83865e88 100644
--- a/roles/matrix-bridge-hookshot/defaults/main.yml
+++ b/roles/matrix-bridge-hookshot/defaults/main.yml
@@ -92,6 +92,7 @@ matrix_hookshot_jira_oauth_uri: "{{ matrix_server_fqn_matrix }}{{ matrix_hooksho
 matrix_hookshot_generic_enabled: true
 # Default value of matrix_hookshot_generic_endpoint: "/hookshot/webhooks"
 matrix_hookshot_generic_endpoint: "{{ matrix_hookshot_webhook_endpoint }}"
+# urlprefix gets updated with protocol & port in group_vars/matrix_servers
 matrix_hookshot_generic_urlprefix: "{{ matrix_server_fqn_matrix }}{{ matrix_hookshot_generic_endpoint }}"
 matrix_hookshot_generic_allow_js_transformation_functions: false
 # If you're also using matrix-appservice-webhooks, take care that these prefixes don't overlap