diff --git a/plays/postdeploy/lib/http.yml b/plays/postdeploy/lib/http.yml
index 98d46c5..1ba9d18 100644
--- a/plays/postdeploy/lib/http.yml
+++ b/plays/postdeploy/lib/http.yml
@@ -5,3 +5,4 @@
     mappings:
       - "http:80:{{ config.vars.port }}"
     state: present
+  when: "'port' in config.vars"
diff --git a/plays/postdeploy/lib/https.yml b/plays/postdeploy/lib/https.yml
index 48def34..6aceefe 100644
--- a/plays/postdeploy/lib/https.yml
+++ b/plays/postdeploy/lib/https.yml
@@ -15,3 +15,4 @@
     mappings:
       - "https:443:{{ config.vars.port }}"
     state: present
+  when: "'port' in config.vars"
diff --git a/plays/postdeploy/lib/proxy.yml b/plays/postdeploy/lib/proxy.yml
index 75377af..c100f39 100644
--- a/plays/postdeploy/lib/proxy.yml
+++ b/plays/postdeploy/lib/proxy.yml
@@ -5,3 +5,4 @@
     mappings:
       - "http:{{ config.vars.port }}:{{ config.vars.port }}"
     state: absent
+  when: "'port' in config.vars"