diff --git a/world/drivers/ldmud/sys/libpsyc.h b/world/drivers/ldmud/sys/libpsyc.h
new file mode 100644
index 0000000..b60dbed
--- /dev/null
+++ b/world/drivers/ldmud/sys/libpsyc.h
@@ -0,0 +1,9 @@
+#ifndef LPC_LIBPSYC_H
+#define LPC_LIBPSYC_H 1
+
+#define PACKET_ROUTING 0	// 2-dimensional mapping of routing modifiers
+#define PACKET_ENTITY  1	// 2-dimensional mapping of entity modifiers
+#define PACKET_METHOD  2	// PSYC method string
+#define PACKET_BODY    3	// packet body.. possibly binary data
+
+#endif