diff --git a/src/proto_quic.c b/src/proto_quic.c
index 2186aa5aa..5d9240cb7 100644
--- a/src/proto_quic.c
+++ b/src/proto_quic.c
@@ -267,6 +267,8 @@ int quic_connect_server(struct connection *conn, int flags)
 	struct conn_src *src;
 	struct sockaddr_storage *addr;
 
+	BUG_ON(!conn->dst);
+
 	conn->flags |= CO_FL_WAIT_L4_CONN; /* connection in progress */
 
 	switch (obj_type(conn->target)) {
@@ -283,11 +285,6 @@ int quic_connect_server(struct connection *conn, int flags)
 		return SF_ERR_INTERNAL;
 	}
 
-	if (!conn->dst) {
-		conn->flags |= CO_FL_ERROR;
-		return SF_ERR_INTERNAL;
-	}
-
 	fd = conn->handle.fd = sock_create_server_socket(conn);
 
 	if (fd == -1) {
diff --git a/src/proto_sockpair.c b/src/proto_sockpair.c
index a621ecbea..55d31febc 100644
--- a/src/proto_sockpair.c
+++ b/src/proto_sockpair.c
@@ -283,6 +283,8 @@ static int sockpair_connect_server(struct connection *conn, int flags)
 {
 	int sv[2], fd, dst_fd = -1;
 
+	BUG_ON(!conn->dst);
+
 	/* the FD is stored in the sockaddr struct */
 	dst_fd = ((struct sockaddr_in *)conn->dst)->sin_addr.s_addr;
 
diff --git a/src/proto_tcp.c b/src/proto_tcp.c
index a160b1b87..77433b0e5 100644
--- a/src/proto_tcp.c
+++ b/src/proto_tcp.c
@@ -266,6 +266,8 @@ int tcp_connect_server(struct connection *conn, int flags)
 	int use_fastopen = 0;
 	struct sockaddr_storage *addr;
 
+	BUG_ON(!conn->dst);
+
 	conn->flags |= CO_FL_WAIT_L4_CONN; /* connection in progress */
 
 	switch (obj_type(conn->target)) {
@@ -290,11 +292,6 @@ int tcp_connect_server(struct connection *conn, int flags)
 		return SF_ERR_INTERNAL;
 	}
 
-	if (!conn->dst) {
-		conn->flags |= CO_FL_ERROR;
-		return SF_ERR_INTERNAL;
-	}
-
 	fd = conn->handle.fd = sock_create_server_socket(conn);
 
 	if (fd == -1) {
diff --git a/src/proto_uxst.c b/src/proto_uxst.c
index cc98e0d5c..da39e6980 100644
--- a/src/proto_uxst.c
+++ b/src/proto_uxst.c
@@ -211,6 +211,8 @@ static int uxst_connect_server(struct connection *conn, int flags)
 	struct server *srv;
 	struct proxy *be;
 
+	BUG_ON(!conn->dst);
+
 	switch (obj_type(conn->target)) {
 	case OBJ_TYPE_PROXY:
 		be = __objt_proxy(conn->target);