diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldInt.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldInt.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldInt.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldInt.php
@@ -33,7 +33,7 @@
   }
 
   public function setValueFromStorage($value) {
-    if (strlen($value)) {
+    if (phutil_nonempty_scalar($value)) {
       $value = (int)$value;
     } else {
       $value = null;