diff --git a/sys/netinet/cc/cc.c b/sys/netinet/cc/cc.c
--- a/sys/netinet/cc/cc.c
+++ b/sys/netinet/cc/cc.c
@@ -106,6 +106,7 @@
 
 VNET_DEFINE(uint32_t, newreno_beta) = 50;
 #define V_newreno_beta VNET(newreno_beta)
+VNET_DEFINE(uint32_t, newreno_beta_ecn) = 80;
 
 void
 cc_refer(struct cc_algo *algo)
diff --git a/sys/netinet/cc/cc_newreno.c b/sys/netinet/cc/cc_newreno.c
--- a/sys/netinet/cc/cc_newreno.c
+++ b/sys/netinet/cc/cc_newreno.c
@@ -99,7 +99,7 @@
 
 VNET_DECLARE(uint32_t, newreno_beta);
 #define V_newreno_beta VNET(newreno_beta)
-VNET_DEFINE(uint32_t, newreno_beta_ecn) = 80;
+VNET_DECLARE(uint32_t, newreno_beta_ecn);
 #define V_newreno_beta_ecn VNET(newreno_beta_ecn)
 
 struct cc_algo newreno_cc_algo = {