diff --git a/lib/rules/boolean-prop-naming.js b/lib/rules/boolean-prop-naming.js
index 9482d87f09..cc0dd2b019 100644
--- a/lib/rules/boolean-prop-naming.js
+++ b/lib/rules/boolean-prop-naming.js
@@ -386,7 +386,7 @@ module.exports = {
               propType = objectTypeAnnotations.get(annotation.typeName.name);
             } else if (annotation.type === 'TSIntersectionType') {
               propType = annotation.types.map((type) => objectTypeAnnotations.get(type.typeName.name))
-                .reduce((prev, cur) => [...prev, ...cur], []);
+                .reduce((prev, cur) => prev.concat(cur), []);
             }
 
             if (propType) {