Index: uspace/lib/c/generic/private/futex.h
===================================================================
--- uspace/lib/c/generic/private/futex.h	(revision 8591b31e206885d6be362b4e18a8f5cc3266ec67)
+++ uspace/lib/c/generic/private/futex.h	(revision 5e6b76d1ba700e44a86813ab3a573920a45bc548)
@@ -46,6 +46,5 @@
 	volatile atomic_int val;
 #ifdef CONFIG_DEBUG_FUTEX
-	// FIXME: Should be _Atomic(fibril_t *)
-	fibril_t *owner;
+	_Atomic(fibril_t *) owner;
 #endif
 } futex_t;