diff --git a/htdocs/caldav.php b/htdocs/caldav.php
index 5733d5cc..749eeeb9 100644
--- a/htdocs/caldav.php
+++ b/htdocs/caldav.php
@@ -28,7 +28,7 @@ function logRequestHeaders() {
   dbg_error_log( "LOG ", "***************** Request Header ****************" );
   dbg_error_log( "LOG ", "%s %s", $_SERVER['REQUEST_METHOD'], $_SERVER['REQUEST_URI'] );
   foreach( $lines AS $k => $v ) {
-    if ( $k != 'Authorization' || (isset($c->dbg['password']) && $c->dbg['password'] ) )
+    if ( strtolower($k) != 'authorization' || (isset($c->dbg['password']) && $c->dbg['password'] ) )
       dbg_error_log( "LOG headers", "-->%s: %s", $k, $v );
     else
       dbg_error_log( "LOG headers", "-->%s: %s", $k, 'Delicious tasty password eaten by debugging monster!' );