Index: uspace/lib/libc/generic/fibril_sync.c
===================================================================
--- uspace/lib/libc/generic/fibril_sync.c	(revision b69bec5e88dc3e437f3f41c9497f63c714a12c39)
+++ uspace/lib/libc/generic/fibril_sync.c	(revision bbb01b98a51d30dabc8f07bc5db6598151f1ad6b)
@@ -103,4 +103,5 @@
 		tmp = fm->waiters.next;
 		wdp = list_get_instance(tmp, awaiter_t, wu_event.link);
+		wdp->active = true;
 		wdp->wu_event.inlist = false;
 		list_remove(&wdp->wu_event.link);