diff --git a/lib/interceptor/cache.js b/lib/interceptor/cache.js
index 6d1225680e7..a47e1158e52 100644
--- a/lib/interceptor/cache.js
+++ b/lib/interceptor/cache.js
@@ -221,7 +221,7 @@ function handleResult (
   // Check if the response is stale
   if (needsRevalidation(result, reqCacheControl)) {
     if (util.isStream(opts.body) && util.bodyLength(opts.body) !== 0) {
-      // If body is is stream we can't revalidate...
+      // If body is a stream we can't revalidate...
       // TODO (fix): This could be less strict...
       return dispatch(opts, new CacheHandler(globalOpts, cacheKey, handler))
     }