diff --git a/test/cpp/grpclb/grpclb_test.cc b/test/cpp/grpclb/grpclb_test.cc
index d67cbac8826c921e823de1f54083c005d04e104b..c3f95a2183552283610c7dcf576aafc169561285 100644
--- a/test/cpp/grpclb/grpclb_test.cc
+++ b/test/cpp/grpclb/grpclb_test.cc
@@ -34,6 +34,8 @@
 #include <cstdarg>
 #include <cstring>
 #include <string>
+#include <cstdint>
+#include <cinttypes>
 
 extern "C" {
 #include <grpc/grpc.h>