Index: uspace/drv/char/ski-con/ski-con.c
===================================================================
--- uspace/drv/char/ski-con/ski-con.c	(revision f30052384594e837924dcd017e96ea8752aa676f)
+++ uspace/drv/char/ski-con/ski-con.c	(revision 39026d7c7b8398cf28a13ecd9f768d4f5d82e2b9)
@@ -31,4 +31,5 @@
  */
 
+#include <async.h>
 #include <ddf/driver.h>
 #include <ddf/log.h>
@@ -149,5 +150,5 @@
 		}
 
-		fibril_usleep(POLL_INTERVAL);
+		async_usleep(POLL_INTERVAL);
 	}
 
Index: uspace/drv/char/sun4v-con/sun4v-con.c
===================================================================
--- uspace/drv/char/sun4v-con/sun4v-con.c	(revision f30052384594e837924dcd017e96ea8752aa676f)
+++ uspace/drv/char/sun4v-con/sun4v-con.c	(revision 39026d7c7b8398cf28a13ecd9f768d4f5d82e2b9)
@@ -149,5 +149,5 @@
 
 	while (con->input_buffer->read_ptr == con->input_buffer->write_ptr)
-		fibril_usleep(POLL_INTERVAL);
+		async_usleep(POLL_INTERVAL);
 
 	p = 0;