diff --git a/lib/include/packet.h b/lib/include/packet.h
new file mode 100644
index 000000000..8cbecc8ac
--- /dev/null
+++ b/lib/include/packet.h
@@ -0,0 +1,19 @@
+#ifndef PACKET_H
+#define PACKET_H
+
+#ifndef MAX_PACKET_SIZE
+#define MAX_PACKET_SIZE 127
+#endif
+
+typedef uint16_t short_addr_t;
+
+struct packet {
+	short_addr_t addr;
+        uint8_t length;
+	volatile struct packet * left;
+	volatile struct packet * right;
+	uint8_t data[MAX_PACKET_SIZE];
+};
+typedef struct packet packet_t;
+
+#endif