diff --git a/src/base/system.cpp b/src/base/system.cpp
index 514c92d5b..a7e6a2b88 100644
--- a/src/base/system.cpp
+++ b/src/base/system.cpp
@@ -1987,6 +1987,8 @@ int net_tcp_connect(NETSOCKET sock, const NETADDR *a)
 	{
 		struct sockaddr_in addr;
 		netaddr_to_sockaddr_in(a, &addr);
+		if(sock->ipv4sock < 0)
+			return -2;
 		return connect(sock->ipv4sock, (struct sockaddr *)&addr, sizeof(addr));
 	}
 
@@ -1994,6 +1996,8 @@ int net_tcp_connect(NETSOCKET sock, const NETADDR *a)
 	{
 		struct sockaddr_in6 addr;
 		netaddr_to_sockaddr_in6(a, &addr);
+		if(sock->ipv6sock < 0)
+			return -2;
 		return connect(sock->ipv6sock, (struct sockaddr *)&addr, sizeof(addr));
 	}