diff --git a/src/common/protocol.h b/src/common/protocol.h
--- a/src/common/protocol.h
+++ b/src/common/protocol.h
@@ -18,6 +18,13 @@
 */
 
 /**
+   Server types:
+ */
+#define DISTREN_SERVERTYPE_SUBMIT (0x1)
+#define DISTREN_SERVERTYPE_DISTRIBUTE (0x2)
+#define DISTREN_SERVERTYPE_RENDER (0x4)
+
+/**
    This file defines the constants and structs that the client uses to talk to the server and that the servers use to talk to eachother.
  */