diff --git a/phone.module b/phone.module
index 865aff2..6f37c73 100644
--- a/phone.module
+++ b/phone.module
@@ -80,7 +80,7 @@ function phone_libphonenumber($detect_only = FALSE, $mute = FALSE) {
 
   $function = 'libraries_' . ($detect_only ? 'detect' : 'load');
   $library = $function('libphonenumber-for-php');
-  $success = $library['installed'] && ($detect_only || $library['loaded']);
+  $success = $library['installed'] && (!$detect_only || $library['loaded']);
 
   if (!$success && !$mute) {
     watchdog('phone', 'The libphonenumber library is not installed. There will be no validation, or formatting of phone numbers unless it is installed. Download it from <a href="!url">here</a> and install it into sites/all/libraries/libphonenumber-for-php. Once installed, you may need to re-save any existing phone field settings, and phone field data may also need updating.', array('!url' => $library['download url']), WATCHDOG_ERROR);