diff --git a/lib/checks/color/color-contrast-evaluate.js b/lib/checks/color/color-contrast-evaluate.js
index 1161dd0b..cceb09b5 100644
--- a/lib/checks/color/color-contrast-evaluate.js
+++ b/lib/checks/color/color-contrast-evaluate.js
@@ -184,7 +184,9 @@ export default function colorContrastEvaluate(node, options, virtualNode) {
     return isValid;
   } catch (err) {
     this.data({ messageKey: 'Check error' });
-    a11yEngine.errorHandler.addCheckError(options?.ruleId, err);
+    if (typeof a11yEngine !== 'undefined' && a11yEngine.errorHandler) {
+      a11yEngine.errorHandler.addCheckError(options?.ruleId, err);
+    }
     return undefined;
   }
 }