diff --git a/src/core/lib/iomgr/tcp_custom.h b/src/core/lib/iomgr/tcp_custom.h
index 9c81e85012e..fd2cb0313d9 100644
--- a/src/core/lib/iomgr/tcp_custom.h
+++ b/src/core/lib/iomgr/tcp_custom.h
@@ -24,7 +24,8 @@
 #include "src/core/lib/iomgr/endpoint.h"
 #include "src/core/lib/iomgr/sockaddr.h"
 
-#define GRPC_CUSTOM_SOCKET_OPT_SO_REUSEPORT (0x00000010u)
+// Same number as the micro of SO_REUSEPORT in kernel
+#define GRPC_CUSTOM_SOCKET_OPT_SO_REUSEPORT (0x00000200u)
 
 typedef struct grpc_tcp_listener grpc_tcp_listener;
 typedef struct grpc_custom_tcp_connect grpc_custom_tcp_connect;