diff --git a/../renalogic/modules/contrib/webform/src/WebformSubmissionConditionsValidator.php b/webform/src/WebformSubmissionConditionsValidator.php
index 0b7d302..70f1c38 100644
--- a/../renalogic/modules/contrib/webform/src/WebformSubmissionConditionsValidator.php
+++ b/webform/src/WebformSubmissionConditionsValidator.php
@@ -799,7 +799,7 @@ class WebformSubmissionConditionsValidator implements WebformSubmissionCondition
 
     // Set negate.
     $negate = FALSE;
-    if (substr($state, 0, 1) === '!') {
+    if ($state[0] === '!') {
       $negate = TRUE;
       $state = ltrim($state, '!');
     }