diff --git a/collect-wireless-mac.capsman b/collect-wireless-mac.capsman
index ae4da2b..c1af7c9 100644
--- a/collect-wireless-mac.capsman
+++ b/collect-wireless-mac.capsman
@@ -8,7 +8,6 @@
 
 :global "identity";
 
-:global CertificateAvailable;
 :global GetMacVendor;
 :global SendNotification;
 
diff --git a/collect-wireless-mac.local b/collect-wireless-mac.local
index 303cb53..ef59f3a 100644
--- a/collect-wireless-mac.local
+++ b/collect-wireless-mac.local
@@ -8,7 +8,6 @@
 
 :global "identity";
 
-:global CertificateAvailable;
 :global GetMacVendor;
 :global SendNotification;
 
diff --git a/collect-wireless-mac.template b/collect-wireless-mac.template
index fc4b3fb..2f108a3 100644
--- a/collect-wireless-mac.template
+++ b/collect-wireless-mac.template
@@ -9,7 +9,6 @@
 
 :global "identity";
 
-:global CertificateAvailable;
 :global GetMacVendor;
 :global SendNotification;
 
diff --git a/global-functions b/global-functions
index c931a26..d4c46ae 100644
--- a/global-functions
+++ b/global-functions
@@ -97,6 +97,8 @@
 :global GetMacVendor do={
   :local mac [ :tostr $1 ];
 
+  :global CertificateAvailable;
+
   :do {
     :local vendor;
     $CertificateAvailable "Let's Encrypt Authority X3" "letsencrypt";