diff --git a/src/Plugin/Field/FieldWidget/FocalPointImageWidget.php b/src/Plugin/Field/FieldWidget/FocalPointImageWidget.php
index 85a008b..15fa268 100644
--- a/src/Plugin/Field/FieldWidget/FocalPointImageWidget.php
+++ b/src/Plugin/Field/FieldWidget/FocalPointImageWidget.php
@@ -86,7 +86,7 @@ public static function attachFocalPoint($element, $fid, $focal_point) {
     }

     // Add the focal point field.
-    $element['focal_point'] = buildFocalPointFormElement($element, $element_selector, $focal_point);
+    $element['focal_point'] = self::buildFocalPointFormElement($element, $element_selector, $focal_point);

     return $element;
   }