diff --git a/src/istio/mixerclient/check_cache.h b/src/istio/mixerclient/check_cache.h
index 36e9080f5cd..49455ed3c77 100644
--- a/src/istio/mixerclient/check_cache.h
+++ b/src/istio/mixerclient/check_cache.h
@@ -148,7 +148,7 @@ class CheckCache {
     std::chrono::time_point<std::chrono::system_clock> expire_time_;
     // if -1, not to check use_count.
     // if 0, cache item should not be used.
-    // use_cound is decreased by 1 for each request,
+    // use_count is decreased by 1 for each request,
     int use_count_;
   };