diff --git a/include/villas/msg.h b/include/villas/msg.h
index 133a457d9..194ffe1b3 100644
--- a/include/villas/msg.h
+++ b/include/villas/msg.h
@@ -27,6 +27,9 @@
 struct msg;
 struct sample;
 
+/** The maximum length of a packet which contains stuct msg. */
+#define MSG_MAX_PACKET_LEN 1500
+
 /** Swaps the byte-order of the message.
  *
  * Message are always transmitted in network (big endian) byte order.
diff --git a/lib/nodes/socket.c b/lib/nodes/socket.c
index 9eb8fcf9d..828375999 100644
--- a/lib/nodes/socket.c
+++ b/lib/nodes/socket.c
@@ -402,7 +402,7 @@ static int socket_write_villas(struct node *n, struct sample *smps[], unsigned c
 {
 	struct socket *s = n->_vd;
 
-	char data[MAX_PACKETLEN];
+	char data[MSG_MAX_PACKET_LEN];
 	ssize_t bytes = 0, sent;
 
 	sent = msg_buffer_from_samples(smps, cnt, data, sizeof(data));