diff --git a/impl/src/layer2/layer2_tx.c b/impl/src/layer2/layer2_tx.c
index 2dfe0a9..62ca81f 100644
--- a/impl/src/layer2/layer2_tx.c
+++ b/impl/src/layer2/layer2_tx.c
@@ -59,13 +59,20 @@ result_t layer2_tx_fill_packet_queue(layer2_tx_t *ctx)
 			// a packet is available -> move it to the queue
 			header.tx_seq_nr = ctx->next_seq_nr;
 
-			uint8_t packetbuf[2048];
+			uint8_t *packetbuf = malloc(2048);
+			if(!packetbuf) {
+				LOG(LVL_ERR, "malloc failed.");
+				return ERR_NO_MEM;
+			}
+
 			ret = read(ctx->tun_fd, packetbuf, sizeof(packetbuf));
 			if(ret < 0) {
 				LOG(LVL_ERR, "read: %s", strerror(errno));
+				free(packetbuf);
 				return ERR_SYSCALL;
 			} else if(ret == 0) {
 				// no more data
+				free(packetbuf);
 				break;
 			}