diff --git a/custom/modules/digital_serial/modules/digital_serial_page/src/Form/SerialPageViewerForm.php b/custom/modules/digital_serial/modules/digital_serial_page/src/Form/SerialPageViewerForm.php
index c8574ab3..13bf0714 100644
--- a/custom/modules/digital_serial/modules/digital_serial_page/src/Form/SerialPageViewerForm.php
+++ b/custom/modules/digital_serial/modules/digital_serial_page/src/Form/SerialPageViewerForm.php
@@ -222,7 +222,7 @@ public function buildForm(array $form, FormStateInterface $form_state, SerialTit
    * Determines if the current browser supports huge canvases.
    */
   private static function browserSupportsHugeCanvas($browser) {
-    return stripos($browser, 'Safari') === FALSE;
+    return !stripos($browser, 'Safari') === FALSE;
   }
 
   /**