Index: libcfa/src/concurrency/io/types.hfa
===================================================================
--- libcfa/src/concurrency/io/types.hfa	(revision 108345a09ade0082054e226d8633c30da5ece5b6)
+++ libcfa/src/concurrency/io/types.hfa	(revision 5024df418d882be3d84bb5d7639c0abc9ffb8b98)
@@ -17,4 +17,6 @@
 #pragma once
 
+#include <limits.h>
+
 extern "C" {
 	#include <linux/types.h>
@@ -25,5 +27,4 @@
 #include "iofwd.hfa"
 #include "kernel/fwd.hfa"
-#include "limits.hfa"
 
 #if defined(CFA_HAVE_LINUX_IO_URING_H)
@@ -140,5 +141,5 @@
 		const __u32 tail = *this->cq.tail;
 
-		if(head == tail) return MAX;
+		if(head == tail) return ULLONG_MAX;
 
 		return this->cq.ts;