Index: uspace/lib/c/generic/private/async.h
===================================================================
--- uspace/lib/c/generic/private/async.h	(revision b76a7329a5e0d6492e93d0011920192b1d80a035)
+++ uspace/lib/c/generic/private/async.h	(revision e3e4a2c1e2aed928ce75965d9e2f08df1b0cf546)
@@ -68,4 +68,10 @@
 	/** Number of opened exchanges */
 	atomic_t refcnt;
+	
+	/** Mutex for stateful connections */
+	fibril_mutex_t remote_state_mtx;
+	
+	/** Data for stateful connections */
+	void *remote_state_data;
 };