diff --git a/include/ucore/rate_limit.h b/include/ucore/rate_limit.h
index fedfd55..7d39755 100644
--- a/include/ucore/rate_limit.h
+++ b/include/ucore/rate_limit.h
@@ -46,6 +46,11 @@
  *    }
  *  }
  */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct RateLimit {
     //how many tickets we want
     long tickets;
@@ -102,5 +107,9 @@ void uc_ratelimit_reset(struct RateLimit *r, long current_ts);
  */
 int uc_ratelimit_allow(struct RateLimit *r, long current_ts);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif