diff --git a/src/osmo-bsc/pcu_sock.c b/src/osmo-bsc/pcu_sock.c
index 1af9a9db6..81198bd29 100644
--- a/src/osmo-bsc/pcu_sock.c
+++ b/src/osmo-bsc/pcu_sock.c
@@ -566,7 +566,7 @@ static int pcu_sock_read(struct osmo_fd *bfd)
 	struct msgb *msg;
 	int rc;
 
-	msg = msgb_alloc(sizeof(*pcu_prim), "pcu_sock_rx");
+	msg = msgb_alloc(sizeof(*pcu_prim) + 1000, "pcu_sock_rx");
 	if (!msg)
 		return -ENOMEM;