diff --git a/src/apps/relay/prom_server.c b/src/apps/relay/prom_server.c
index ec395125..8bd82fa8 100644
--- a/src/apps/relay/prom_server.c
+++ b/src/apps/relay/prom_server.c
@@ -3,6 +3,28 @@
 #include "mainrelay.h"
 #include "prom_server.h"
 
+prom_gauge_t *turn_status;
+
+prom_gauge_t *turn_traffic_rcvp;
+prom_gauge_t *turn_traffic_rcvb;
+prom_gauge_t *turn_traffic_sentp;
+prom_gauge_t *turn_traffic_sentb;
+
+prom_gauge_t *turn_total_traffic_rcvp;
+prom_gauge_t *turn_total_traffic_rcvb;
+prom_gauge_t *turn_total_traffic_sentp;
+prom_gauge_t *turn_total_traffic_sentb;
+
+prom_gauge_t *turn_traffic_peer_rcvp;
+prom_gauge_t *turn_traffic_peer_rcvb;
+prom_gauge_t *turn_traffic_peer_sentp;
+prom_gauge_t *turn_traffic_peer_sentb;
+
+prom_gauge_t *turn_total_traffic_peer_rcvp;
+prom_gauge_t *turn_total_traffic_peer_rcvb;
+prom_gauge_t *turn_total_traffic_peer_sentp;
+prom_gauge_t *turn_total_traffic_peer_sentb;
+
 int start_prometheus_server(void){
   if (turn_params.prometheus == 0){
     return 0;
diff --git a/src/apps/relay/prom_server.h b/src/apps/relay/prom_server.h
index 0211038d..cade4849 100644
--- a/src/apps/relay/prom_server.h
+++ b/src/apps/relay/prom_server.h
@@ -16,27 +16,27 @@
 
 #define DEFAULT_PROM_SERVER_PORT (9641)
 
-prom_gauge_t *turn_status;
+extern prom_gauge_t *turn_status;
 
-prom_gauge_t *turn_traffic_rcvp;
-prom_gauge_t *turn_traffic_rcvb;
-prom_gauge_t *turn_traffic_sentp;
-prom_gauge_t *turn_traffic_sentb;
+extern prom_gauge_t *turn_traffic_rcvp;
+extern prom_gauge_t *turn_traffic_rcvb;
+extern prom_gauge_t *turn_traffic_sentp;
+extern prom_gauge_t *turn_traffic_sentb;
 
-prom_gauge_t *turn_total_traffic_rcvp;
-prom_gauge_t *turn_total_traffic_rcvb;
-prom_gauge_t *turn_total_traffic_sentp;
-prom_gauge_t *turn_total_traffic_sentb;
+extern prom_gauge_t *turn_total_traffic_rcvp;
+extern prom_gauge_t *turn_total_traffic_rcvb;
+extern prom_gauge_t *turn_total_traffic_sentp;
+extern prom_gauge_t *turn_total_traffic_sentb;
 
-prom_gauge_t *turn_traffic_peer_rcvp;
-prom_gauge_t *turn_traffic_peer_rcvb;
-prom_gauge_t *turn_traffic_peer_sentp;
-prom_gauge_t *turn_traffic_peer_sentb;
+extern prom_gauge_t *turn_traffic_peer_rcvp;
+extern prom_gauge_t *turn_traffic_peer_rcvb;
+extern prom_gauge_t *turn_traffic_peer_sentp;
+extern prom_gauge_t *turn_traffic_peer_sentb;
 
-prom_gauge_t *turn_total_traffic_peer_rcvp;
-prom_gauge_t *turn_total_traffic_peer_rcvb;
-prom_gauge_t *turn_total_traffic_peer_sentp;
-prom_gauge_t *turn_total_traffic_peer_sentb;
+extern prom_gauge_t *turn_total_traffic_peer_rcvp;
+extern prom_gauge_t *turn_total_traffic_peer_rcvb;
+extern prom_gauge_t *turn_total_traffic_peer_sentp;
+extern prom_gauge_t *turn_total_traffic_peer_sentb;
 
 #ifdef __cplusplus
 extern "C" {