diff --git a/wordpress/wp-content/themes/backer/header.php b/wordpress/wp-content/themes/backer/header.php
index d4879d6c2d0c32ef39c8c171be1fbf81f28f9d1a..50c269cb9bb819352fd61295d6535cb4801014a9 100644
--- a/wordpress/wp-content/themes/backer/header.php
+++ b/wordpress/wp-content/themes/backer/header.php
@@ -56,22 +56,25 @@
         return ((elemTop <= docViewTop));
       }
 
-      var sticky = $('#sidebar');
-      var stopper = $('.sticky-stop');
       var catcher = $('#main-content');
 
-      $('body').scroll(function() {
-        if(isScrolledTo(catcher)) {
-          catcher.addClass('sticky');
-        } else {
-          catcher.removeClass('sticky');
-        }
-        if ( sticky.height() > stopper.offset().top) {
-          catcher.addClass('at-bottom');
-        } else {
-          catcher.removeClass('at-bottom');
-        }
-      });
+      if (catcher.length) {
+        var sticky = $('#sidebar');
+        var stopper = $('.sticky-stop');
+
+        $('body').scroll(function() {
+          if(isScrolledTo(catcher)) {
+            catcher.addClass('sticky');
+          } else {
+            catcher.removeClass('sticky');
+          }
+          if ( sticky.height() > stopper.offset().top) {
+            catcher.addClass('at-bottom');
+          } else {
+            catcher.removeClass('at-bottom');
+          }
+        });
+      }
     });
   </script>
   <style>