Add whether is_member func exists before calling it

diff --git a/sections/interior-page.php b/sections/interior-page.php
index fe9a754..569b767 100644 (file)
--- a/sections/interior-page.php
+++ b/sections/interior-page.php
@@ -1,5 +1,5 @@
 <main class="page-inside">
-    <?php $member_header = (is_member() ) ? 'member-header' : 'interior-header'; ?>
+    <?php $member_header = (function_exists('is_member') && is_member() ) ? 'member-header' : 'interior-header'; ?>
     <div id="header-image" class="page-header <?php echo $member_header; ?>">
     <?php
         if(function_exists('get_member_data')){