Index: uspace/lib/c/generic/fibril_synch.c
===================================================================
--- uspace/lib/c/generic/fibril_synch.c	(revision 39026d7c7b8398cf28a13ecd9f768d4f5d82e2b9)
+++ uspace/lib/c/generic/fibril_synch.c	(revision a53ed3a8097360ccf174e8d94fb407db919eb66a)
@@ -352,5 +352,5 @@
 }
 
-int
+errno_t
 fibril_condvar_wait_timeout(fibril_condvar_t *fcv, fibril_mutex_t *fm,
     suseconds_t timeout)
@@ -392,5 +392,5 @@
 void fibril_condvar_wait(fibril_condvar_t *fcv, fibril_mutex_t *fm)
 {
-	int rc;
+	errno_t rc;
 
 	rc = fibril_condvar_wait_timeout(fcv, fm, 0);
@@ -434,8 +434,8 @@
  * @param arg	Timer
  */
-static int fibril_timer_func(void *arg)
+static errno_t fibril_timer_func(void *arg)
 {
 	fibril_timer_t *timer = (fibril_timer_t *) arg;
-	int rc;
+	errno_t rc;
 
 	fibril_mutex_lock(timer->lockp);