diff --git a/include/haproxy/stream-t.h b/include/haproxy/stream-t.h
index b4677cb2f..d5f07b9c8 100644
--- a/include/haproxy/stream-t.h
+++ b/include/haproxy/stream-t.h
@@ -180,6 +180,7 @@ enum {
 	STRM_EVT_SHUT_SRV_DOWN = 0x00000004, /* Must be shut because the selected server became available */
 	STRM_EVT_SHUT_SRV_UP   = 0x00000008, /* Must be shut because a preferred server became available */
 	STRM_EVT_KILLED        = 0x00000010, /* Must be shut for external reason */
+	STRM_EVT_RES           = 0x00000020, /* A requested resource is available (a buffer, a conn_slot...) */
 };
 
 /* This function is used to report flags in debugging tools. Please reflect
diff --git a/include/haproxy/stream.h b/include/haproxy/stream.h
index 46464f860..09732bcf2 100644
--- a/include/haproxy/stream.h
+++ b/include/haproxy/stream.h
@@ -412,6 +412,7 @@ static inline void stream_shutdown(struct stream *s, int why)
 static inline unsigned int stream_map_task_state(unsigned int state)
 {
 	return ((state & TASK_WOKEN_TIMER) ? STRM_EVT_TIMER : 0)         |
+		((state & TASK_WOKEN_RES)  ? STRM_EVT_RES : 0)           |
 		((state & TASK_WOKEN_MSG)  ? STRM_EVT_MSG : 0)           |
 		((state & TASK_F_UEVT1)    ? STRM_EVT_SHUT_SRV_DOWN : 0) |
 		((state & TASK_F_UEVT3)    ? STRM_EVT_SHUT_SRV_UP : 0)   |