diff --git a/include/types/proxy.h b/include/types/proxy.h
index 6af0a24..ed632a2 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -119,6 +119,7 @@
 #define PR_O2_RDPC_PRST	0x00000200      /* Actvate rdp cookie analyser */
 #define PR_O2_CLFLOG	0x00000400      /* log into clf format */
 #define PR_O2_LOGHCHKS	0x00000800	/* log health checks */
+#define PR_O2_INDEPSTR	0x00001000	/* independant streams, don't update rex on write */
 
 struct error_snapshot {
 	struct timeval when;		/* date of this event, (tv_sec == 0) means "never" */
diff --git a/include/types/stream_interface.h b/include/types/stream_interface.h
index e1e3646..a693497 100644
--- a/include/types/stream_interface.h
+++ b/include/types/stream_interface.h
@@ -69,6 +69,7 @@
 	SI_FL_WAIT_DATA  = 0x0008,  /* waiting for more data to send */
 	SI_FL_CAP_SPLTCP = 0x0010,  /* splicing possible from/to TCP */
 	SI_FL_DONT_WAKE  = 0x0020,  /* resync in progress, don't wake up */
+	SI_FL_INDEP_STR  = 0x0040,  /* independant streams = don't update rex on write */
 };
 
 #define SI_FL_CAP_SPLICE (SI_FL_CAP_SPLTCP)