diff --git a/lib/util/propTypes.js b/lib/util/propTypes.js
index 25d5010c4c..adc723165f 100644
--- a/lib/util/propTypes.js
+++ b/lib/util/propTypes.js
@@ -548,7 +548,7 @@ module.exports = function propTypesInstructions(context, components, utils) {
       let typeName;
       if (astUtil.isTSTypeReference(node)) {
         typeName = node.typeName.name;
-        const shouldTraverseTypeParams = !typeName || allowedGenericTypes.includes(typeName);
+        const shouldTraverseTypeParams = !typeName || allowedGenericTypes.indexOf(typeName) !== -1;
         if (shouldTraverseTypeParams && node.typeParameters && node.typeParameters.length !== 0) {
           const nextNode = node.typeParameters.params[0];
           this.visitTSNode(nextNode);