Index: uspace/drv/test2/test2.c
===================================================================
--- uspace/drv/test2/test2.c	(revision c245f16e32b7e3ef731e81556156d471431b6bb9)
+++ uspace/drv/test2/test2.c	(revision bd813861801556b8db9bf68757dadd65653cf582)
@@ -103,4 +103,8 @@
 	if (dev->parent == NULL) {
 		fid_t postpone = fibril_create(postponed_birth, dev);
+		if (postpone == 0) {
+			printf(NAME ": fibril_create() error\n");
+			return ENOMEM;
+		}
 		fibril_add_ready(postpone);
 	} else {