diff --git a/lib/netplay/netplay.cpp b/lib/netplay/netplay.cpp
index ba8f64ba208..ffd732fc9b3 100644
--- a/lib/netplay/netplay.cpp
+++ b/lib/netplay/netplay.cpp
@@ -130,7 +130,7 @@ SYNC_COUNTER sync_counter;		// keeps track on how well we are in sync
 // ////////////////////////////////////////////////////////////////////////
 // Types
 
-std::atomic_int upnp_status;
+static std::atomic_int upnp_status;
 
 struct Statistic
 {