diff --git a/includes/webform.conditionals.inc b/includes/webform.conditionals.inc
index 370bcce..f6e23d7 100644
--- a/includes/webform.conditionals.inc
+++ b/includes/webform.conditionals.inc
@@ -959,16 +959,8 @@ function webform_conditional_operator_string_equal($input_values, $rule_value) {
  * Conditional callback for string comparisons.
  */
 function webform_conditional_operator_string_not_equal($input_values, $rule_value) {
-  $found = FALSE;
-  foreach ($input_values as $value) {
-    // Checkbox values come in as 0 integers for unchecked boxes.
-    $value = ($value === 0) ? '' : $value;
-    if (strcasecmp($value, $rule_value) === 0) {
-      $found = TRUE;
-    }
-  }
-  return !$found;
-}
+  return !webform_conditional_operator_string_equal($input_values, $rule_value);
+ }
 
 /**
  * Conditional callback for string comparisons.