diff --git a/src/d_clisrv.h b/src/d_clisrv.h
index 3c56850647042516e729f39a13b4d50db4dd4040..4bbe26059f6654a7960a7506fb55f1f84d99c2c7 100644
--- a/src/d_clisrv.h
+++ b/src/d_clisrv.h
@@ -293,6 +293,7 @@ typedef struct
 	SINT8 adminplayer; // Needs to be signed
 
 	SINT8 sharedlives;
+	char server_context[8]; // unique context id, generated at server startup.
 	UINT8 varlengthinputs[0]; // Playernames and netvars
 } ATTRPACK serverconfig_pak;