diff --git a/netplay/netplay.c b/netplay/netplay.c
index b8bd17b7c1..c1264e6ae3 100644
--- a/netplay/netplay.c
+++ b/netplay/netplay.c
@@ -36,6 +36,8 @@ enum
    CMD_OPT_REQUIRE_SYNC             = 0x10
 };
 
+void *netplay_data;
+
 /**
  * warn_hangup:
  *
diff --git a/netplay/netplay_private.h b/netplay/netplay_private.h
index feb9e86a6b..d7f83296e7 100644
--- a/netplay/netplay_private.h
+++ b/netplay/netplay_private.h
@@ -131,7 +131,7 @@ struct netplay
    struct netplay_callbacks* net_cbs;
 };
 
-void *netplay_data;
+extern void *netplay_data;
 
 struct netplay_callbacks* netplay_get_cbs_net(void);
 struct netplay_callbacks* netplay_get_cbs_spectate(void);
@@ -148,4 +148,4 @@ bool np_send_info(netplay_t *netplay);
 bool np_get_info(netplay_t *netplay);
 bool np_is_server(netplay_t* netplay);
 bool np_is_spectate(netplay_t* netplay);
-#endif
\ No newline at end of file
+#endif